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315 lines
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315 lines
173 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H04J" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>H04J</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>MULTIPLEX COMMUNICATION </text><reference><text>transmission in general <class-ref scheme="cpc">H04B</class-ref>; peculiar to transmission of digital information <class-ref scheme="cpc">H04L5/00</class-ref>; systems for the simultaneous or sequential transmission of more than one television signal <class-ref scheme="cpc">H04N7/08</class-ref>; in exchanges <class-ref scheme="cpc">H04Q11/00</class-ref>; stereophonic systems <class-ref scheme="cpc">H04S</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This subclass <u>covers</u> <br/><subnote type="bullet"><note-paragraph>circuits or apparatus for combining or dividing signals for the purpose of transmitting them simultaneously or sequentially over the same transmission path; </note-paragraph><note-paragraph>monitoring arrangements therefor. </note-paragraph></subnote></note-paragraph></note><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H04J1/00" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J1/00" definition-exists="true" ipc-concordant="H04J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency-division multiplex systems </text><reference><text><class-ref scheme="cpc">H04J14/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J1/02" definition-exists="false" ipc-concordant="H04J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/04" definition-exists="true" ipc-concordant="H04J1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency-transposition arrangements </text><CPC-specific-text><reference><text>modulation with carrier or side-band suppression <class-ref scheme="cpc">H03C1/52</class-ref>, <class-ref scheme="cpc">H03C1/60</class-ref>; single-band suppression <class-ref scheme="cpc">H04B1/00</class-ref>, <class-ref scheme="cpc">H04B15/00</class-ref>; telegraphic communication <class-ref scheme="cpc">H04L27/02</class-ref>, <class-ref scheme="cpc">H04L25/49</class-ref>; transference of modulation from one carrier to another, e.g. frequency- changing <class-ref scheme="cpc">H03D7/00</class-ref>; demodulation or transference of modulation of modulated electromagnetic waves <class-ref scheme="cpc">H03D9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J1/045" definition-exists="false" ipc-concordant="H04J1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters applied to frequency transposition</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J1/05" definition-exists="true" ipc-concordant="H04J1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using digital techniques</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/06" definition-exists="true" ipc-concordant="H04J1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for supplying the carrier waves </text><CPC-specific-text><text>Arrangements for supplying synchronisation signals </text><reference><text>carrier supply <class-ref scheme="cpc">H04L5/10</class-ref>; frequency multiplication <class-ref scheme="cpc">H03B19/00</class-ref>, <class-ref scheme="cpc">H03B21/00</class-ref>; mixing <class-ref scheme="cpc">H03D7/00</class-ref>, <class-ref scheme="cpc">H03D9/00</class-ref>; synchronisation in general <class-ref scheme="cpc">H03B</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J1/065" definition-exists="false" ipc-concordant="H04J1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/08" definition-exists="true" ipc-concordant="H04J1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for combining channels </text><CPC-specific-text><reference><text>branching filters <class-ref scheme="cpc">H01P1/213</class-ref>, <class-ref scheme="cpc">H03H7/46</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J1/085" definition-exists="false" ipc-concordant="H04J1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Terminal station; Combined modulator and demodulator circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/10" definition-exists="true" ipc-concordant="H04J1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Intermediate station arrangements, e.g. for branching, for tapping-off </text><CPC-specific-text><reference><text>repeater circuits <class-ref scheme="cpc">H04B3/36</class-ref>, <class-ref scheme="cpc">H04B3/58</class-ref>; two-way amplifiers <class-ref scheme="cpc">H03F3/62</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/12" definition-exists="true" ipc-concordant="H04J1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04J1/12</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Arrangements for reducing cross-talk between channels </text><CPC-specific-text><reference><text>in line transmission systems <class-ref scheme="cpc">H04B3/32</class-ref>; in cables or lines <class-ref scheme="cpc">H04B3/26</class-ref> - <class-ref scheme="cpc">H04B3/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/14" definition-exists="false" ipc-concordant="H04J1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements providing for calling or supervisory signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J1/16" definition-exists="false" ipc-concordant="H04J1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring arrangements </text><CPC-specific-text><reference><text>for transmission in general <class-ref scheme="cpc">H04B17/00</class-ref>; for amplifiers <class-ref scheme="cpc">H03F1/52</class-ref>, <class-ref scheme="cpc">H03F1/523</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J1/18" definition-exists="false" ipc-concordant="H04J1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>H04J1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which all the carriers are amplitude-modulated </text><reference><text><class-ref scheme="cpc">H04J1/02</class-ref> takes precedence </text><CPC-specific-text><text>in telephony <class-ref scheme="cpc">H04Q11/02</class-ref>, <class-ref scheme="cpc">H04Q11/023</class-ref>; in stereophony <class-ref scheme="cpc">H04H</class-ref>; in telegraphy <class-ref scheme="cpc">H04L5/06</class-ref>; in telemetry <class-ref scheme="cpc">G08C15/02</class-ref>, <class-ref scheme="cpc">G08C15/04</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J1/20" definition-exists="false" ipc-concordant="H04J1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04J1/20</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>in which at least one carrier is angle-modulated </text><reference><text><class-ref scheme="cpc">H04J1/02</class-ref> takes precedence; FM without multiplex <class-ref scheme="cpc">H04B1/00</class-ref>, <class-ref scheme="cpc">H04B14/006</class-ref>, <class-ref scheme="cpc">H04B15/00</class-ref>; PSK <class-ref scheme="cpc">H04L5/12</class-ref>; impulse-modulation without multiplex <class-ref scheme="cpc">H04B14/02</class-ref>; time-division multiplexing for data transmission <class-ref scheme="cpc">H04L5/22</class-ref>; telemetry <class-ref scheme="cpc">G08C15/06</class-ref> - <class-ref scheme="cpc">G08C15/12</class-ref>; telephony <class-ref scheme="cpc">H04Q11/00</class-ref>, <class-ref scheme="cpc">H04Q11/04</class-ref>, <class-ref scheme="cpc">H04Q11/0407</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J3/00" definition-exists="true" ipc-concordant="H04J3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-division multiplex systems </text><reference><text><class-ref scheme="cpc">H04J14/00</class-ref> takes precedence; relay systems <class-ref scheme="cpc">H04B7/14</class-ref>; selecting techniques <class-ref scheme="cpc">H04Q</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/02" definition-exists="true" ipc-concordant="H04J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details </text><reference><text>electronic switching or gating <class-ref scheme="cpc">H03K17/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/025" definition-exists="false" ipc-concordant="H04J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filter arrangements </text><reference><text><class-ref scheme="cpc">H04J3/08</class-ref> takes precedence; filters <u>per se</u> <class-ref scheme="cpc">H03H7/00</class-ref>, <class-ref scheme="cpc">H03H9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/04" definition-exists="true" ipc-concordant="H04J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04J3/04</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Distributors combined with modulators or demodulators </text><CPC-specific-text><reference><text>pulse distributors in general <class-ref scheme="cpc">H03K5/15</class-ref>; pulse counters <class-ref scheme="cpc">H03K21/00</class-ref> - <class-ref scheme="cpc">H03K29/06</class-ref>; for telegraphy <class-ref scheme="cpc">H04L5/22</class-ref>, <class-ref scheme="cpc">H04L13/00</class-ref> - <class-ref scheme="cpc">H04L23/00</class-ref>, <class-ref scheme="cpc">H04L25/45</class-ref>; for telephony <class-ref scheme="cpc">H04Q11/04</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/042" definition-exists="false" ipc-concordant="H04J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributors with electron or gas discharge tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/045" definition-exists="true" ipc-concordant="H04J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributors with CRT</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/047" definition-exists="true" ipc-concordant="H04J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributors with transistors or integrated circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/06" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synchronising arrangements </text><CPC-specific-text><reference><text>for television systems <class-ref scheme="cpc">H04N5/04</class-ref>; bit-synchronisation <class-ref scheme="cpc">H04L7/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/0602" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems characterised by the synchronising information used</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0605" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special codes used as synchronising signal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0608" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detectors therefor, e.g. correlators, state machines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0611" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PN codes </text><reference><text><class-ref scheme="cpc">H04J3/0608</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0614" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the synchronising signal being characterised by the amplitude, duration or polarity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0617" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the synchronising signal being characterised by the frequency or phase</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/062" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers </text><reference><text>pulse-stuffing <class-ref scheme="cpc">H04J3/07</class-ref>; asynchronous-synchronous conversion <class-ref scheme="cpc">H04L5/24</class-ref>; speed conversion <class-ref scheme="cpc">H04L25/05</class-ref>; speed conversion in computers <class-ref scheme="cpc">G06F5/06</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0623" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0626" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>plesiochronous multiplexing systems, e.g. plesiochronous digital hierarchy [PDH], jitter attenuators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0629" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a network, e.g. in combination with switching or multiplexing, slip buffers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0632" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04J3/0632</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES] </text><reference><text>queuing arrangements in packet switching elements <class-ref scheme="cpc">H04L49/90</class-ref>; synchronising systems for the synchronous transmission of a pulse code modulated video signal with one or more other pulse code modulated signals <class-ref scheme="cpc">H04N7/56</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/0635" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock or time synchronisation in a network </text><reference><text>timer in protocols <class-ref scheme="cpc">H04L69/28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0638" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock or time synchronisation among nodes; Internode synchronisation </text><reference><text>synchronization for ring networks <class-ref scheme="cpc">H04L12/422</class-ref>; data switching networks with synchronous transmission <class-ref scheme="cpc">H04L12/43</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0641" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0641</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Change of the master or reference, e.g. take-over or failure of the master</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0644" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>External master-clock</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0647" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation among TDM nodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J3/065" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using timestamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0652" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP] </text><reference><text>bus network with centralized control in which slots are of a TDMA packet structure <class-ref scheme="cpc">H04L12/4035</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J3/0655" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using timestamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0658" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0658</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock or time synchronisation among packet nodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J3/0661" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using timestamps</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04J3/0664" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>unidirectional timestamps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04J3/0667" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H04J3/0667</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays </text><reference><text>arrangements for monitoring round trip delays in packet switching networks <class-ref scheme="cpc">H04L43/0864</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H04J3/067" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the timestamp structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J3/0673" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using intermediate nodes, e.g. modification of a received timestamp before further transmission to the next packet node, e.g. including internal delay time or residence time into the packet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0676" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mutual</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0679" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0679</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by determining clock distribution path in a network</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0682" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0682</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/0685" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clock or time synchronisation in a node; Intranode synchronisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0688" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Change of the master or reference, e.g. take-over or failure of the master</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0691" definition-exists="false" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0691</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation in a TDM node</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0694" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation in a TDMA node, e.g. TTP</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J3/0697" definition-exists="true" ipc-concordant="H04J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/0697</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation in a packet node</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/07" definition-exists="true" ipc-concordant="H04J3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pulse stuffing for systems with different or fluctuating information rates </text><CPC-specific-text><text>or bit rates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/073" definition-exists="true" ipc-concordant="H04J3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit stuffing, e.g. PDH</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/076" definition-exists="true" ipc-concordant="H04J3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit and byte stuffing, e.g. SDH/PDH desynchronisers, bit-leaking</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/08" definition-exists="true" ipc-concordant="H04J3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Intermediate station arrangements, e.g. for branching, for tapping-off</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/085" definition-exists="true" ipc-concordant="H04J3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/10" definition-exists="false" ipc-concordant="H04J3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for reducing cross-talk between channels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/12" definition-exists="false" ipc-concordant="H04J3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements providing for calling or supervisory signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/125" definition-exists="true" ipc-concordant="H04J3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>One of the channel pulses or the synchronisation pulse is also used for transmitting monitoring or supervisory signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/14" definition-exists="true" ipc-concordant="H04J3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring arrangements </text><CPC-specific-text><reference><text>for SDH/SONET rings <class-ref scheme="cpc">H04J3/085</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/16" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted </text><reference><text><class-ref scheme="cpc">H04J3/17</class-ref>, <class-ref scheme="cpc">H04J3/24</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/1605" definition-exists="false" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixed allocated frame structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/1611" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronous digital hierarchy [SDH] or SONET </text><reference><text><class-ref scheme="cpc">H04J3/1664</class-ref> takes precedence for interactions with OTN</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1617" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1617</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>carrying packets or ATM cells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/1623" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plesiochronous digital hierarchy [PDH]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1629" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Format building algorithm</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1635" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Format conversion, e.g. CEPT/US</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1641" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1641</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hierarchical systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1647" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subrate or multislot multiplexing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/1652" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical Transport Network [OTN]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1658" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>H04J3/1658</classification-symbol><class-title date-revised="2015-11-01"><title-part><CPC-specific-text><text>carrying packets or ATM cells; </text><reference><text><class-ref scheme="cpc">H04J3/1664</class-ref> takes precedence for payloads with different packet types</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/1664" definition-exists="false" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>carrying hybrid payloads, e.g. different types of packets or carrying frames and packets in the paylaod</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J3/167" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interaction with SDH/SONET, e.g. carrying SDH/SONET frames, interfacing with SDH/SONET </text><reference><text><class-ref scheme="cpc">H04J3/1664</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/1676" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-division multiplex with pulse-position, pulse-interval, or pulse-width modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/1682" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1682</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J3/1688" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling </text><reference><text>reducing bandwidth of signals in general <class-ref scheme="cpc">H04B1/66</class-ref>; in PCM-systems <class-ref scheme="cpc">H04B14/046</class-ref>; removal of redundancy in telegraph communication <class-ref scheme="cpc">H03M7/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/1694" definition-exists="true" ipc-concordant="H04J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/1694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers </text><reference><text>Passive Optical Networks <class-ref scheme="cpc">H04Q11/0062</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/17" definition-exists="true" ipc-concordant="H04J3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI </text><CPC-specific-text><reference><text>speech analysis or identification <class-ref scheme="cpc">G10L</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/172" definition-exists="true" ipc-concordant="H04J3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital speech interpolation, i.e. DSI</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/175" definition-exists="true" ipc-concordant="H04J3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Speech activity or inactivity detectors </text><reference><text>echo suppressors <class-ref scheme="cpc">H04B3/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/177" definition-exists="false" ipc-concordant="H04J3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/177</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Freeze-out systems, e.g. taking away active sources from transmission</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/18" definition-exists="true" ipc-concordant="H04J3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using frequency compression and subsequent expansion of the individual signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/20" definition-exists="false" ipc-concordant="H04J3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using resonant transfer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/22" definition-exists="true" ipc-concordant="H04J3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the sources have different rates or codes </text><CPC-specific-text><reference><text>simultaneous speech and digital data or video transmission <class-ref scheme="cpc">H04M11/06</class-ref>; <u>see</u> provisional also <class-ref scheme="cpc">H04J3/16</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J3/24" definition-exists="true" ipc-concordant="H04J3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the allocation is indicated by an address </text><CPC-specific-text><text>the different channels being transmitted sequentially</text></CPC-specific-text><reference><text><class-ref scheme="cpc">H04J3/17</class-ref> takes precedence; in computers <class-ref scheme="cpc">G06F12/00</class-ref>, <class-ref scheme="cpc">G06F13/00</class-ref> </text><CPC-specific-text><text>code multiplex systems <class-ref scheme="cpc">H04J13/00</class-ref>; selecting techniques <class-ref scheme="cpc">H04Q</class-ref>; relay systems <class-ref scheme="cpc">H04B7/14</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/242" definition-exists="true" ipc-concordant="H04J3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the frames being of variable length</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/245" definition-exists="false" ipc-concordant="H04J3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the allocation protocols between more than two stations share the same transmission medium </text><reference><text>stations for satellite systems <class-ref scheme="cpc">H04B7/185</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/247" definition-exists="true" ipc-concordant="H04J3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ATM or packet multiplexing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J3/26" definition-exists="true" ipc-concordant="H04J3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the information and the address are simultaneously transmitted</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J4/00" definition-exists="true" ipc-concordant="H04J4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H04J4/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Combined time-division and frequency-division multiplex systems </text><reference><text><class-ref scheme="cpc">H04J13/00</class-ref> takes precedence </text><CPC-specific-text><text>; data transmission <class-ref scheme="cpc">H04L5/26</class-ref>; telemetry <class-ref scheme="cpc">G08C15/00</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J4/005" definition-exists="true" ipc-concordant="H04J4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J4/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmultiplexing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J7/00" definition-exists="true" ipc-concordant="H04J7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J7/02" definition-exists="false" ipc-concordant="H04J7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the polarity of the amplitude is characteristic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J9/00" definition-exists="true" ipc-concordant="H04J9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiplex systems in which each channel is represented by a different type of modulation of the carrier</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J11/00" definition-exists="true" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Orthogonal multiplex systems, </text><CPC-specific-text><text>e.g. using WALSH codes</text></CPC-specific-text><reference><text><class-ref scheme="cpc">H04J13/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04J11/0003" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination with other multiplexing techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J11/0006" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with CDM/CDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J11/0009" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with FDM/FDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J11/0013" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with TDM/TDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J11/0016" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with FDM/FDMA and TDM/TDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J11/002" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay multiplexing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J11/0023" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H04J11/0023</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>Interference mitigation or co-ordination </text><reference><text>direct sequence spread spectrum [DSSS] systems <class-ref scheme="cpc">H04B1/7097</class-ref>; frequency hopping <class-ref scheme="cpc">H04B1/713</class-ref>; allocation criteria for ingress interference avoidance <class-ref scheme="cpc">H04L5/0062</class-ref>; frequency allocation criteria for requirements on out-of-channel emissions <class-ref scheme="cpc">H04L5/0066</class-ref>; arrangements for removing intersymbol interference or baseband equalisers <class-ref scheme="cpc">H04L25/03006</class-ref>; peak power aspects in multicarrier modulation <class-ref scheme="cpc">H04L27/2614</class-ref>; power management <class-ref scheme="cpc">H04W52/00</class-ref>; traffic scheduling <class-ref scheme="cpc">H04W72/54</class-ref>, <class-ref scheme="cpc">H04W72/541</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0026" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of multi-user interference</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J11/003" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the transmitter </text><reference><text>transmission to multiple receive units in multiple input multiple output [MIMO] <class-ref scheme="cpc">H04B7/0452</class-ref>; transmit antenna weighting <class-ref scheme="cpc">H04B7/0615</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J11/0033" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by pre-cancellation of known interference, e.g. using a matched filter, dirty paper coder or Thomlinson-Harashima precoder </text><reference><text>correlative coding in synchronous or start-stop systems <class-ref scheme="cpc">H04L25/497</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J11/0036" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the receiver</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J11/004" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using regenerative subtractive interference cancellation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J11/0043" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by grouping or ordering the users</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J11/0046" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using joint detection algorithms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/005" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of intercell interference</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J11/0053" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using co-ordinated multipoint transmission/reception </text><reference><text>co-ordinated antenna or beam-forming aspects <class-ref scheme="cpc">H04B7/022</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J11/0056" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-base station aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J11/0059" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Out-of-cell user aspects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0063" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of multipath interference, e.g. Rake receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0066" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of narrowband interference </text><reference><text>narrowband interference reduction <class-ref scheme="cpc">H04B1/1036</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J11/0069" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cell search, i.e. determining cell identity [cell-ID] </text><reference><text>design of multiplexing codes <class-ref scheme="cpc">H04J13/00</class-ref>; processing access restriction or access information <class-ref scheme="cpc">H04W48/16</class-ref>; discovery of network devices for network data management <class-ref scheme="cpc">H04W8/005</class-ref>; sounding signals for channel estimation <class-ref scheme="cpc">H04L25/0226</class-ref>; structure of reference signals in multicarrier modulation systems <class-ref scheme="cpc">H04L27/2613</class-ref>; frame, time or carrier synchronisation in multicarrier modulation systems <class-ref scheme="cpc">H04L27/2655</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0073" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0076" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0079" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acquisition of downlink reference signals, e.g. detection of cell-ID</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0083" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-mode cell search, i.e. where several modes or systems can be used, e.g. backwards compatible, dual mode or flexible systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0086" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Search parameters, e.g. search strategy, accumulation length, range of search, thresholds </text><reference><text>code acquisition in DSSS <class-ref scheme="cpc">H04B1/7075</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0089" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Search hardware arrangements, e.g. sharing of correlators to reduce complexity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J11/0093" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J11/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Neighbour cell search</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04J11/0096" definition-exists="false" ipc-concordant="H04J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2011/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network synchronisation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J13/00" definition-exists="true" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Code division multiplex systems </text><reference><text>for frequency hopping <class-ref scheme="cpc">H04B1/713</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> When classifying in this group, any aspect of spread spectrum techniques not specific to frequency hopping, and which is considered to represent information of interest for search, may also be classified in group <class-ref scheme="cpc">H04B1/69</class-ref>. </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J13/0003" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code application, i.e. aspects relating to how codes are applied to form multiplexed channels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J13/0007" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code type</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Code type information should be classified in addition to other relevant aspects. This should also be done in cases where the other relevant symbol refers to code type, e.g. <class-ref scheme="cpc">H04J13/14</class-ref>, <class-ref scheme="cpc">H04J13/20</class-ref> ) </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/0011" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complementary</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0014" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Golay</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/0018" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Chaotic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/0022" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PN, e.g. Kronecker</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0025" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>M-sequences</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0029" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gold</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0033" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Kasami</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J13/0037" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilevel codes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/004" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Orthogonal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0044" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>OVSF [orthogonal variable spreading factor]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0048" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Walsh</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0051" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Orthogonal gold</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/0055" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ZCZ [zero correlation zone]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/0059" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>CAZAC [constant-amplitude and zero auto-correlation]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J13/0062" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zadoff-Chu</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J13/0066" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>GCL [generalized chirp-like] sequences</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/007" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LAS, i.e. LA, LS and LAS codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J13/0074" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0074</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code shifting or hopping</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J13/0077" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicode, e.g. multiple codes assigned to one user</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J13/0081" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with FDM/FDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J13/0085" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with TDM/TDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J13/0088" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with FDM/FDMA and TDM/TDMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J13/0092" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay multiplexing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04J13/0096" definition-exists="false" ipc-concordant="H04J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2013/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Network synchronisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J13/10" definition-exists="false" ipc-concordant="H04J13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Code generation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J13/102" definition-exists="false" ipc-concordant="H04J13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combining codes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/105" definition-exists="false" ipc-concordant="H04J13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by extending</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J13/107" definition-exists="false" ipc-concordant="H04J13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J13/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by concatenation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/007" definition-exists="true" ipc-concordant="H04J14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Orthogonal Optical Code Multiplex</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0206" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Express channels arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/021" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0213" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Groups of channels or wave bands arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0215" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Architecture aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0216" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bidirectional architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0217" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-degree architectures, e.g. having a connection degree greater than two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/0226" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixed carrier allocation, e.g. according to service</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/0227" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0228" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/023" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in WDM passive optical networks [WDM-PON]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0232" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for downstream transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J14/0234" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiple wavelengths</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0235" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for upstream transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0238" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0239" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0241" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0242" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in WDM-PON</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0245" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for downstream transmission, e.g. optical line terminal [OLT] to ONU</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J14/0246" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one wavelength per ONU</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H04J14/0247" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sharing one wavelength for at least a group of ONUs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0249" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0256" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the optical channel layer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0257" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength assignment algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0261" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at the optical multiplex section layer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0263" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplex section layer wavelength assignment algorithms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0264" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplex identification or labelling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0265" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplex arrangements in bidirectional systems, e.g. interleaved allocation of wavelengths or allocation of wavelength groups</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0267" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical signaling or routing </text><reference><text>routing or path finding of packets in data switching networks <class-ref scheme="cpc">H04L45/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0268" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H04J14/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Restoration of optical paths, e.g. p-cycles </text><reference><text>route fault recovery of packets in data switching networks <class-ref scheme="cpc">H04L45/28</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0271" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Impairment aware routing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0273" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical overhead, e.g. overhead processing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0275" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an optical service channel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H04J14/0276" definition-exists="false" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pilot tones</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/0278" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM optical network architectures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0279" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0279</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM point-to-point architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/028" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM bus architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0282" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM tree architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0283" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM ring architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0284" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM mesh architectures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0286" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>WDM hierarchical architectures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/0287" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection in WDM systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0289" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical multiplex section protection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/029" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dedicated protection at the optical multiplex section (1+1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H04J14/0295" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shared protection at the optical channel (1:1, n:m)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H04J14/0297" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical equipment protection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/0298" definition-exists="true" ipc-concordant="H04J14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/0298</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with sub-carrier multiplexing [SCM]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J14/04" definition-exists="true" ipc-concordant="H04J14/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mode multiplex systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J14/06" definition-exists="true" ipc-concordant="H04J14/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Polarisation multiplex systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H04J14/08" definition-exists="true" ipc-concordant="H04J14/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-division multiplex systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H04J14/086" definition-exists="true" ipc-concordant="H04J14/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J14/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Medium access </text><reference><text><class-ref scheme="cpc">H04J3/16</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H04J99/00" definition-exists="false" ipc-concordant="H04J99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H04J99/00</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H04J203/00" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H04J203/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aspects of optical multiplex systems other than those covered by <class-ref scheme="cpc">H04J14/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H04J203/0001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switching elements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Space switch details</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time switch details</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a shared central buffer</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0012" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switching modules and their interconnections</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0014" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Clos</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0016" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Crossbar</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0017" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parallel switch planes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0019" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multicast/broadcast capabilities</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0021" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control mechanisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0023" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Routing/path finding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Peripheral units</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Physical details</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0028" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Local loop</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Medium of transmission, e.g. fibre, cable, radio</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0032" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fibre</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metallic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0035" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Radio</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0037" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Satellite</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0039" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0039</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Topology</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0042" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ring</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0044" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bus, e.g. DQDB</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>User Network Interface</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0048" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Network termination, e.g. NT1, NT2, PBX</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Terminal equipment, e.g. codecs, synch</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0051" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Network Node Interface, e.g. tandem connections, transit switching</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Routing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0055" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Network design, dimensioning, topology or optimisation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0057" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Operations, administration and maintenance [OAM]</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0058" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Network management, e.g. Intelligent nets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fault tolerance and recovery</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Testing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0064" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Admission Control</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signalling, e.g. protocols, reference model</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0067" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resource management and allocation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0069" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Channel allocation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0071" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Services, e.g. multimedia, GOS, QOS</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0075" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connection-oriented</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0076" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Channel characteristics, e.g. BER, error detection, error correction, delay, jitter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0078" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Support of N-ISDN</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Support of video</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0082" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interaction of SDH with non-ATM protocols</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Support of the IP protocol</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H04J203/0085" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Support of Ethernet</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0087" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Support of voice</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H04J203/0089" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiplexing, e.g. coding, scrambling, SONET</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0091" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time slot assignment</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0092" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Code Division Multiple Access [CDMA]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0094" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Virtual Concatenation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H04J203/0096" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H04J2203/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Serial Concatenation</text></title-part></class-title></classification-item></classification-item>
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