H04Q 2213/00
Indexing scheme relating to selecting arrangements in general and for multiplex systems
H04Q2213/00 (Indexing scheme relating to selecting arrangements in general and for multiplex systems) appears on 7,545 US grants and 4,594 published applications in this corpus.
Search patents in H04Q- Granted patents
- 7,545
- Published applications
- 4,594
- Assignees
- 1,818
- Inventors
- 13,079
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 13 | 0 |
| 1987 | 15 | 0 |
| 1988 | 35 | 0 |
| 1989 | 22 | 0 |
| 1990 | 42 | 0 |
| 1991 | 60 | 0 |
| 1992 | 65 | 0 |
| 1993 | 86 | 0 |
| 1994 | 139 | 0 |
| 1995 | 177 | 0 |
| 1996 | 256 | 0 |
| 1997 | 255 | 0 |
| 1998 | 374 | 0 |
| 1999 | 395 | 0 |
| 2000 | 333 | 0 |
| 2001 | 423 | 152 |
| 2002 | 382 | 413 |
| 2003 | 355 | 366 |
| 2004 | 334 | 305 |
| 2005 | 258 | 318 |
| 2006 | 312 | 270 |
| 2007 | 251 | 283 |
| 2008 | 215 | 262 |
| 2009 | 213 | 253 |
| 2010 | 242 | 224 |
| 2011 | 244 | 158 |
| 2012 | 244 | 163 |
| 2013 | 239 | 127 |
| 2014 | 231 | 140 |
| 2015 | 191 | 107 |
| 2016 | 137 | 91 |
| 2017 | 139 | 122 |
| 2018 | 121 | 163 |
| 2019 | 122 | 100 |
| 2020 | 129 | 115 |
| 2021 | 96 | 89 |
| 2022 | 75 | 88 |
| 2023 | 84 | 88 |
| 2024 | 84 | 77 |
| 2025 | 77 | 70 |
| 2026 | 41 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04Q 2213/13103MemoryIndexing code1,962
- H04Q 2213/13204ProtocolsIndexing code1,714
- H04Q 2213/13389Lan, internetIndexing code1,636
- H04Q 2213/13209IsdnIndexing code1,272
- H04Q 2213/13106Microprocessor, cpuIndexing code1,193
- H04Q 2213/13176Common channel signaling, ccs7Indexing code1,174
- H04Q 2213/13034A/d conversion, code compression/expansionIndexing code1,146
- H04Q 2213/13141Hunting for free outlet, circuit or channelIndexing code1,032
All 445 subgroupsShow fewer
- H04Q 2213/1322PbxIndexing code925
- H04Q 2213/13098Mobile subscriberIndexing code911
- H04Q 2213/13097Numbering, addressingIndexing code870
- H04Q 2213/13093Personal computer, pcIndexing code809
- H04Q 2213/13292Time division multiplexing, tdmIndexing code793
- H04Q 2213/13345Intelligent networks, scpIndexing code780
- H04Q 2213/13166Fault preventionIndexing code758
- H04Q 2213/13196Connection circuit/link/trunk/junction, bridge, router, gatewayIndexing code746
- H04Q 2213/13091Cli, identification of calling lineIndexing code717
- H04Q 2213/13216Code signals, frame structureIndexing code699
- H04Q 2213/13095Pin / access code, authenticationIndexing code678
- H04Q 2213/13349Network managementIndexing code619
- H04Q 2213/13299BusIndexing code611
- H04Q 2213/13109Initializing, personal profileIndexing code607
- H04Q 2213/1305Software aspectsIndexing code603
- H04Q 2213/1332Logic circuitsIndexing code591
- H04Q 2213/13003Constructional details of switching devicesIndexing code526
- H04Q 2213/13175Graphical user interface [gui], www interface, visual indicationIndexing code526
- H04Q 2213/13174Data transmission, file transferIndexing code518
- H04Q 2213/13377Recorded announcementIndexing code512
- H04Q 2213/13298Local loop systems, access networkIndexing code456
- H04Q 2213/13096Digital apparatus individually associated with a subscriber line, digital line circuitsIndexing code453
- H04Q 2213/13332Broadband, catv, dynamic bandwidth allocationIndexing code442
- H04Q 2213/1302Relay switchesIndexing code427
- H04Q 2213/1304Coordinate switches, crossbar, 4/2 with relays, coupling fieldIndexing code419
- H04Q 2213/1329Asynchronous transfer mode, atmIndexing code410
- H04Q 2213/13405Dual frequency signaling, dtmfIndexing code410
- H04Q 2213/13072Sequence circuits for call signaling, acd systemsIndexing code403
- H04Q 2213/13199Modem, modulationIndexing code391
- H04Q 2213/1301Optical transmission, optical switchesIndexing code386
- H04Q 2213/1307Call setupIndexing code359
- H04Q 2213/13296Packet switching, x.25, frame relayIndexing code359
- H04Q 2213/13039Asymmetrical two-way transmissionIndexing code356
- H04Q 2213/13167Redundant apparatusIndexing code342
- H04Q 2213/1313Metering, billingIndexing code339
- H04Q 2213/13102Common translatorIndexing code332
- H04Q 2213/13202Network termination [nt]Indexing code331
- H04Q 2213/13376Information service, downloading of information, 0800/0900 servicesIndexing code325
- H04Q 2213/13322Integrated circuitsIndexing code319
- H04Q 2213/13107Control equipment for a part of the connection, distributed control, co-processingIndexing code317
- H04Q 2213/13213Counting, timing circuitsIndexing code315
- H04Q 2213/1316Service observation, testingIndexing code306
- H04Q 2213/13282Call forward, follow-me, call diversionIndexing code299
- H04Q 2213/1324Conference callIndexing code286
- H04Q 2213/1309Apparatus individually associated with a subscriber line, line circuitsIndexing code262
- H04Q 2213/13396Signaling in general, in-band signallingIndexing code262
- H04Q 2213/1319Amplifier, attenuation circuit, echo suppressorIndexing code260
- H04Q 2213/13164TrafficIndexing code257
- H04Q 2213/1338Inter-exchange connectionIndexing code254
- H04Q 2213/13337Picturephone, videotelephonyIndexing code253
- H04Q 2213/1334Configuration within the switchIndexing code246
- H04Q 2213/13383Hierarchy of switches, main and subexchangeIndexing code227
- H04Q 2213/1336SynchronisationIndexing code226
- H04Q 2213/13384Inter-pbx traffic, pbx networksIndexing code226
- H04Q 2213/13256Call screeningIndexing code222
- H04Q 2213/13353Routing table, map memoryIndexing code213
- H04Q 2213/13348Channel/line reservationIndexing code209
- H04Q 2213/13547SubscriberIndexing code205
- H04Q 2213/13399Virtual channel/circuitsIndexing code204
- H04Q 2213/13527Protocols - x.25, tcap etcIndexing code201
- H04Q 2213/13541RoutingIndexing code195
- H04Q 2213/1337Operator, emergency servicesIndexing code194
- H04Q 2213/13076Distributing frame, mdf, cross-connect switchIndexing code191
- H04Q 2213/13173Busy signalsIndexing code188
- H04Q 2213/13375Electronic mailIndexing code188
- H04Q 2213/13179Fax, still pictureIndexing code180
- H04Q 2213/13305Transistors, semiconductors in generalIndexing code175
- H04Q 2213/1308Power supplyIndexing code168
- H04Q 2213/1325Priority serviceIndexing code167
- H04Q 2213/13104Central control, computer controlIndexing code159
- H04Q 2213/13092Scanning of subscriber lines, monitoringIndexing code151
- H04Q 2213/1318RingingIndexing code149
- H04Q 2213/13513Upt - personal as opposed to terminal mobility, inc. number portabilityIndexing code149
- H04Q 2213/13152CallbackIndexing code146
- H04Q 2213/13335Simulation, emulationIndexing code145
- H04Q 2213/13248MultimediaIndexing code142
- H04Q 2213/13339Ciphering, encryption, securityIndexing code141
- H04Q 2213/13162Fault indication and localisationIndexing code140
- H04Q 2213/13367Hierarchical multiplexing, add-drop multiplexingIndexing code139
- H04Q 2213/1328Call transferIndexing code138
- H04Q 2213/13336Store & forward, messaging systemsIndexing code138
- H04Q 2213/13178Control signalsIndexing code135
- H04Q 2213/13138Least cost routing, lcrIndexing code126
- H04Q 2213/13224Off-net subscriber, dial in to/out from network, teleworkingIndexing code123
- H04Q 2213/13056Routines, finite state machinesIndexing code122
- H04Q 2213/13546Intelligent peripheralIndexing code117
- H04Q 2213/13532Mobile networksIndexing code115
- H04Q 2213/13214Clock signalsIndexing code114
- H04Q 2213/1327Release and resetting of connectionIndexing code114
- H04Q 2213/13515Authentication, authorisation - fraud preventionIndexing code114
- H04Q 2213/13374PagingIndexing code110
- H04Q 2213/13242Broadcast, diffusion, multicast, point-to-multipointIndexing code108
- H04Q 2213/13533Multivendor and hybridIndexing code108
- H04Q 2213/13031Pulse code modulation, pcmIndexing code102
- H04Q 2213/13222Pbx circuits in public exchange, centrexIndexing code102
- H04Q 2213/13205Primary rate access, priIndexing code97
- H04Q 2213/1326Consultation call, broker's call, call hold, togglingIndexing code96
- H04Q 2213/13378Speech recognition, speech analysisIndexing code94
- H04Q 2213/13331Abbreviated diallingIndexing code89
- H04Q 2213/13381Pair-gain system, digital loop carriersIndexing code89
- H04Q 2213/13352Self-routing networks, real-time routingIndexing code85
- H04Q 2213/13208Inverse multiplexing, channel bondingIndexing code83
- H04Q 2213/13523Bandwidth managementIndexing code82
- H04Q 2213/1315Call waitingIndexing code80
- H04Q 2213/13215Code checking, crcIndexing code80
- H04Q 2213/13393Time slot switching, t-stage, time slot interchanging, tsiIndexing code80
- H04Q 2213/13274Call rejection, call barringIndexing code79
- H04Q 2213/13145Rerouting upon failureIndexing code74
- H04Q 2213/13286Direct in-dialling in pbx, ddiIndexing code73
- H04Q 2213/13333Earth satellitesIndexing code71
- H04Q 2213/13302Magnetic elementsIndexing code69
- H04Q 2213/13395Permanent channel, leased lineIndexing code69
- H04Q 2213/13036Serial/parallel conversion, parallel bit transmissionIndexing code68
- H04Q 2213/13203Exchange termination [et]Indexing code68
- H04Q 2213/13526Resource managementIndexing code68
- H04Q 2213/13385Off-net subscriberIndexing code67
- H04Q 2213/13206User-to-user signaling, uusIndexing code62
- H04Q 2213/13271Forced releaseIndexing code62
- H04Q 2213/13545Monitoring of signaling messages, intelligent networkIndexing code61
- H04Q 2213/13342Arrangement of switches in the networkIndexing code60
- H04Q 2213/13163Fault alarmIndexing code59
- H04Q 2213/13201Change-over of service during connectionIndexing code58
- H04Q 2213/13294Cdma, code division multiplexing, i.e. combinations of h04q2213/13291 and/or h04q2213/13292 with spaceIndexing code57
- H04Q 2213/13504Client/server architecturesIndexing code57
- H04Q 2213/13503Object-oriented systemsIndexing code56
- H04Q 2213/13517Slee - service logic executionIndexing code55
- H04Q 2213/13251Restricted service, class of serviceIndexing code53
- H04Q 2213/13341Connections within the switchIndexing code53
- H04Q 2213/13535Distributed systems - also domains in service creationIndexing code53
- H04Q 2213/13531Virtual networks - inc. pvnIndexing code51
- H04Q 2213/13149Change of providerIndexing code50
- H04Q 2213/13146Rerouting upon blocking/overload, rearrangementIndexing code49
- H04Q 2213/13407Detection of data transmission modeIndexing code49
- H04Q 2213/13344OverflowIndexing code48
- H04Q 2213/13386Line concentratorIndexing code48
- H04Q 2213/13291Frequency division multiplexing, fdmIndexing code47
- H04Q 2213/13521Fault managementIndexing code47
- H04Q 2213/13217Cranckback in routing, trombone connection, loopback circuitIndexing code46
- H04Q 2213/13334Key telephone systemsIndexing code46
- H04Q 2213/13392Channels assigned according to rulesIndexing code46
- H04Q 2213/179FacsimileIndexing code46
- H04Q 2213/13148Maximum profit routingIndexing code45
- H04Q 2213/13362Asynchronous systemsIndexing code45
- H04Q 2213/13525Gui - graphical user interface, inc. for service creationIndexing code43
- H04Q 2213/13099Loop multiplexerIndexing code42
- H04Q 2213/135Service creationIndexing code42
- H04Q 2213/13512800 - freefoneIndexing code42
- H04Q 2213/204Isdn protocolIndexing code42
- H04Q 2213/13012Hybrid fiber coax, hfcIndexing code41
- H04Q 2213/13144Searching path through number of switching stages or nodesIndexing code41
- H04Q 2213/13372Intercepting operatorIndexing code39
- H04Q 2213/103MemoriesIndexing code38
- H04Q 2213/13297Coupling different rates in tdm systems, data rate adaptationIndexing code38
- H04Q 2213/13134Coin boxes, payphone, prepaidIndexing code37
- H04Q 2213/13516Agents or brokers - user, terminal etc., also osi agent/managersIndexing code36
- H04Q 2213/216Code signalsIndexing code36
- H04Q 2213/13054Expert systemIndexing code35
- H04Q 2213/13057Object-oriented softwareIndexing code35
- H04Q 2213/13139Fraud detection/preventionIndexing code34
- H04Q 2213/13082Power supply via phantom lineIndexing code33
- H04Q 2213/13194Four wire connection, transmissionIndexing code33
- H04Q 2213/13528Scp architectureIndexing code33
- H04Q 2213/13288Closed user groups, cugIndexing code32
- H04Q 2213/13522Traffic managementIndexing code32
- H04Q 2213/09Subscriber related equipmentIndexing code31
- H04Q 2213/13343Neural networksIndexing code30
- H04Q 2213/13387Call gappingIndexing code30
- H04Q 2213/13542Numbering plansIndexing code30
- H04Q 2213/174Data transmissionIndexing code29
- H04Q 2213/1331Delay elements, shift registersIndexing code28
- H04Q 2213/095User accessIndexing code27
- H04Q 2213/13094Range extenderIndexing code27
- H04Q 2213/003Constructional detailsIndexing code26
- H04Q 2213/13295Wavelength multiplexing, wdmIndexing code26
- H04Q 2213/13534Internet - www, html, browsers etcIndexing code26
- H04Q 2213/13561Congestion - inc. overflowIndexing code26
- H04Q 2213/392Channel allocation - special rulesIndexing code26
- H04Q 2213/034CodecIndexing code25
- H04Q 2213/214Phase shifted impulsesIndexing code25
- H04Q 2213/13361Synchronous systemsIndexing code24
- H04Q 2213/093Personal computerIndexing code23
- H04Q 2213/107Control equipment for part of the connectionIndexing code23
- H04Q 2213/299BusIndexing code23
- H04Q 2213/36SynchronisationIndexing code23
- H04Q 2213/091Indication of kind/number of subscriberIndexing code22
- H04Q 2213/096Digital subscriber terminalIndexing code22
- H04Q 2213/13191RepeaterIndexing code22
- H04Q 2213/13566MediationIndexing code22
- H04Q 2213/337PicturephoneIndexing code22
- H04Q 2213/08Power supplyIndexing code21
- H04Q 2213/097NumberingIndexing code21
- H04Q 2213/13501Feature interactionsIndexing code21
- H04Q 2213/13502Primitives - inc. service-independent building blocks [sibbs]Indexing code21
- H04Q 2213/297Coupling circuits between different tdm systemsIndexing code21
- H04Q 2213/002Graphical representationIndexing code20
- H04Q 2213/18RingingIndexing code19
- H04Q 2213/05Software aspectsIndexing code18
- H04Q 2213/13514Quality of service - inc. grade of serviceIndexing code18
- H04Q 2213/13544Modeling or simulation, particularly of networksIndexing code18
- H04Q 2213/13548Call modelingIndexing code18
- H04Q 2213/292Time multiplexingIndexing code18
- H04Q 2213/03PamIndexing code17
- H04Q 2213/13306Ferro-electric elementsIndexing code17
- H04Q 2213/38Interexchange connectionsIndexing code17
- H04Q 2213/13388Saturation signaling systemsIndexing code16
- H04Q 2213/13562BlockingIndexing code16
- H04Q 2213/22PbxIndexing code16
- H04Q 2213/13136Collect callIndexing code15
- H04Q 2213/098Mobile subscriberIndexing code14
- H04Q 2213/1333Random systemsIndexing code14
- H04Q 2213/176Common channel signallingIndexing code14
- H04Q 2213/345Intelligent networkIndexing code14
- H04Q 2213/13524Cost managementIndexing code13
- H04Q 2213/13565RestorationIndexing code13
- H04Q 2213/171Number indicating signalsIndexing code13
- H04Q 2213/296Packet switchingIndexing code13
- H04Q 2213/13058Interrupt requestIndexing code12
- H04Q 2213/201Change-over serviceIndexing code12
- H04Q 2213/206User-to-user signallingIndexing code12
- H04Q 2213/331Abbreviated dialingIndexing code12
- H04Q 2213/377Recorded announcementIndexing code11
- H04Q 2213/109InitialisingIndexing code10
- H04Q 2213/13038Optical modulationIndexing code10
- H04Q 2213/13053Priority levelsIndexing code10
- H04Q 2213/13168Error correctionIndexing code10
- H04Q 2213/13172Supervisory signalsIndexing code10
- H04Q 2213/1323Party lineIndexing code10
- H04Q 2213/13284Call tracingIndexing code10
- H04Q 2213/13293Tasi, irregular time division, burst switchingIndexing code10
- H04Q 2213/13567Negotiation, management policy, goalsIndexing code10
- H04Q 2213/199ModemIndexing code10
- H04Q 2213/332Broadband systemIndexing code10
- H04Q 2213/056Software routinesIndexing code9
- H04Q 2213/13338Do-not-disturbIndexing code9
- H04Q 2213/13505Management information base [mib]Indexing code9
- H04Q 2213/208Inverse multiplexingIndexing code9
- H04Q 2213/256Call screeningIndexing code9
- H04Q 2213/298Loop or ring systemIndexing code9
- H04Q 2213/13ChargingIndexing code8
- H04Q 2213/13272Premature releaseIndexing code8
- H04Q 2213/13564Load balancingIndexing code8
- H04Q 2213/141Hunting for free outlet, circuit, channelIndexing code8
- H04Q 2213/16Service observationIndexing code8
- H04Q 2213/172Supervisory signalsIndexing code8
- H04Q 2213/13156Automatic digit redialling, automatic call retryIndexing code7
- H04Q 2213/13402Data transmission out of voice frequency bandIndexing code7
- H04Q 2213/167RedundancyIndexing code7
- H04Q 2213/19Echo-cancellingIndexing code7
- H04Q 2213/375Electronic mailIndexing code7
- H04Q 2213/031PcmIndexing code6
- H04Q 2213/054Expert systemsIndexing code6
- H04Q 2213/102Common translatorIndexing code6
- H04Q 2213/13046Binary switch, β-elementIndexing code6
- H04Q 2213/13543Network planning, configuration managementIndexing code6
- H04Q 2213/13563Call gappingIndexing code6
- H04Q 2213/166Prevention of faultsIndexing code6
- H04Q 2213/175Indexing scheme relating to selecting arrangements in general and for multiplex systemsIndexing code6
- H04Q 2213/178Control signalsIndexing code6
- H04Q 2213/24Conference circuitIndexing code6
- H04Q 2213/28Call transferIndexing code6
- H04Q 2213/282Call forwardingIndexing code6
- H04Q 2213/31Delay devicesIndexing code6
- H04Q 2213/322Integrated circuitIndexing code6
- H04Q 2213/378Speech recognitionIndexing code6
- H04Q 2213/381Pair gain systemIndexing code6
- H04Q 2213/052Multi-taskingIndexing code5
- H04Q 2213/07Call distributionIndexing code5
- H04Q 2213/076Distributing frameIndexing code5
- H04Q 2213/099Loop multiplexerIndexing code5
- H04Q 2213/106MicrocomputerIndexing code5
- H04Q 2213/13051Software generationIndexing code5
- H04Q 2213/131RegisterIndexing code5
- H04Q 2213/13511ReservationIndexing code5
- H04Q 2213/14Busy testIndexing code5
- H04Q 2213/196Connection-circuitIndexing code5
- H04Q 2213/202Network termination [nt]Indexing code5
- H04Q 2213/205Primary rate accessIndexing code5
- H04Q 2213/29AtmIndexing code5
- H04Q 2213/362Asynchronous systemIndexing code5
- H04Q 2213/02Relay switchesIndexing code4
- H04Q 2213/033Indexing scheme relating to selecting arrangements in general and for multiplex systemsIndexing code4
- H04Q 2213/055Linked listsIndexing code4
- H04Q 2213/1303Pulse amplitude modulation, pamIndexing code4
- H04Q 2213/13363Pulse stuffing, bit stuffingIndexing code4
- H04Q 2213/152Automatic call retryIndexing code4
- H04Q 2213/173Busy signalIndexing code4
- H04Q 2213/32Logic elementsIndexing code4
- H04Q 2213/339Ciphering/encryptionIndexing code4
- H04Q 2213/37OperatorIndexing code4
- H04Q 2213/399Virtual channel allocationIndexing code4
- H04Q 2213/04Coordinate switchesIndexing code3
- H04Q 2213/053Priority levelsIndexing code3
- H04Q 2213/058IrqIndexing code3
- H04Q 2213/072Sequence circuitsIndexing code3
- H04Q 2213/104Central controlIndexing code3
- H04Q 2213/13391Channel assigned to connectionsIndexing code3
- H04Q 2213/138Least cost routingIndexing code3
- H04Q 2213/161Blocking or cutoff of faulty apparatusIndexing code3
- H04Q 2213/194Four-wire connection or transmissionIndexing code3
- H04Q 2213/215Code checkingIndexing code3
- H04Q 2213/286Direct inward dialling [pbx]Indexing code3
- H04Q 2213/391Channel allocation to connectionsIndexing code3
- H04Q 2213/394Channel assignment without time slot switchingIndexing code3
- H04Q 2213/396Signalling in generalIndexing code3
- H04Q 2213/401Dc and voltages of different kinds or valuesIndexing code3
- H04Q 2213/405Voice frequency current used for digit selectionIndexing code3
- H04Q 2213/017Optical polarisationIndexing code2
- H04Q 2213/036Series parallel conversionIndexing code2
- H04Q 2213/038Optical modulationIndexing code2
- H04Q 2213/13016Optical subcarrier modulationIndexing code2
- H04Q 2213/13052MultitaskingIndexing code2
- H04Q 2213/1339Fixed association of channelsIndexing code2
- H04Q 2213/15WaitingIndexing code2
- H04Q 2213/164Traffic registrationIndexing code2
- H04Q 2213/242Broadcast and multicastIndexing code2
- H04Q 2213/251Restricted serviceIndexing code2
- H04Q 2213/26Call-backIndexing code2
- H04Q 2213/27ReleaseIndexing code2
- H04Q 2213/272Premature releaseIndexing code2
- H04Q 2213/295Wavelength division multiplexIndexing code2
- H04Q 2213/33Special systemsIndexing code2
- H04Q 2213/333Systems with earth-satellitesIndexing code2
- H04Q 2213/334Key telephone systemIndexing code2
- H04Q 2213/34General schemeIndexing code2
- H04Q 2213/343Neural networkIndexing code2
- H04Q 2213/361Synchronous systemIndexing code2
- H04Q 2213/363Bit or pulse stuffingIndexing code2
- H04Q 2213/384Inter-pbx trafficIndexing code2
- H04Q 2213/385Traffic in pbx to and from public exchangeIndexing code2
- H04Q 2213/011Periodic optical structuresIndexing code1
- H04Q 2213/042Elements placed in matrix relation, not serving as connection switchIndexing code1
- H04Q 2213/069Panel switchesIndexing code1
- H04Q 2213/082Phantom circuitsIndexing code1
- H04Q 2213/092Scanning of lines, registers, translatorsIndexing code1
- H04Q 2213/094Range extenderIndexing code1
- H04Q 2213/11Sequence switchesIndexing code1
- H04Q 2213/13001Step by step switchesIndexing code1
- H04Q 2213/13121MarkerIndexing code1
- H04Q 2213/13124Pulse distributorIndexing code1
- H04Q 2213/132Multiple-zone-meteringIndexing code1
- H04Q 2213/13246Instant speaker's algorithm [isa]Indexing code1
- H04Q 2213/13287Wake-up call serviceIndexing code1
- H04Q 2213/145ReroutingIndexing code1
- H04Q 2213/177Number sending signalsIndexing code1
- H04Q 2213/191RepeaterIndexing code1
- H04Q 2213/197Ping-pong transmissionIndexing code1
- H04Q 2213/198Temporary associated devicesIndexing code1
- H04Q 2213/20IsdnIndexing code1
- H04Q 2213/203Exchange termination [et]Indexing code1
- H04Q 2213/211Impulse correction or reshapingIndexing code1
- H04Q 2213/217Setting of switch by means of pulsesIndexing code1
- H04Q 2213/25Preferential serviceIndexing code1
- H04Q 2213/271Forced releaseIndexing code1
- H04Q 2213/293Irregular time switchingIndexing code1
- H04Q 2213/304SuperconductorsIndexing code1
- H04Q 2213/307Hall elementsIndexing code1
- H04Q 2213/308Photo conductorsIndexing code1
- H04Q 2213/335SimulationIndexing code1
- H04Q 2213/349Network managementIndexing code1
- H04Q 2213/367Multiple multiplexingIndexing code1
- H04Q 2213/376Information serviceIndexing code1
- H04Q 2213/383Main and subexchangeIndexing code1
- H04Q 2213/395Permanent channelsIndexing code1
- H04Q 2213/001MotorselectorsIndexing code0
- H04Q 2213/012Tunable opticalo systemsIndexing code0
- H04Q 2213/013Optical shuttersIndexing code0
- H04Q 2213/014Optical storage, not delay linesIndexing code0
- H04Q 2213/0153d-optical arrangementIndexing code0
- H04Q 2213/016Optical subcarrier modulationIndexing code0
- H04Q 2213/032Delta modulationIndexing code0
- H04Q 2213/037Resonant transferIndexing code0
- H04Q 2213/046Binary switchIndexing code0
- H04Q 2213/061PreselectorIndexing code0
- H04Q 2213/062Finder switchIndexing code0
- H04Q 2213/063Strowger-switch as finder switchIndexing code0
- H04Q 2213/064Cascaded finder or preselector switchesIndexing code0
- H04Q 2213/065Group selectorIndexing code0
- H04Q 2213/066Switch with two or more wipersetsIndexing code0
- H04Q 2213/067Finder switch serving as final selectorIndexing code0
- H04Q 2213/068Final selectorIndexing code0
- H04Q 2213/10RegisterIndexing code0
- H04Q 2213/101Discriminating selectorsIndexing code0
- H04Q 2213/12Call indicatorIndexing code0
- H04Q 2213/121MarkerIndexing code0
- H04Q 2213/124Pulse distributorIndexing code0
- H04Q 2213/13281Call transfer/forward at nightIndexing code0
- H04Q 2213/133Multiple-time-meteringIndexing code0
- H04Q 2213/134Coin boxIndexing code0
- H04Q 2213/136Collect callIndexing code0
- H04Q 2213/144Searching a free path through cascaded switching stagesIndexing code0
- H04Q 2213/146RearrangementIndexing code0
- H04Q 2213/156Automatic rediallingIndexing code0
- H04Q 2213/162Fault indicationIndexing code0
- H04Q 2213/163Fault alarmIndexing code0
- H04Q 2213/182Ring tripIndexing code0
- H04Q 2213/192Common amplifier for bidirectional trafficIndexing code0
- H04Q 2213/21Impulse transmissionIndexing code0
- H04Q 2213/212Absorbing of digitsIndexing code0
- H04Q 2213/218Bistable relaysIndexing code0
- H04Q 2213/222Pbx circuits in public exchangeIndexing code0
- H04Q 2213/23PartylineIndexing code0
- H04Q 2213/243Con-castIndexing code0
- H04Q 2213/246Instant speaker's algorithm [isa]Indexing code0
- H04Q 2213/252Breaking-in on existing connectionIndexing code0
- H04Q 2213/274Call rejectionIndexing code0
- H04Q 2213/281Prepared call transferIndexing code0
- H04Q 2213/284Call tracingIndexing code0
- H04Q 2213/287Call serviceIndexing code0
- H04Q 2213/291Frequency division multiplexIndexing code0
- H04Q 2213/294Indexing scheme relating to selecting arrangements in general and for multiplex systemsIndexing code0
- H04Q 2213/301Tubes and other non-linear elements with 2 electrodesIndexing code0
- H04Q 2213/302Magnetic elementsIndexing code0
- H04Q 2213/303Tubes and other non-linear elements with more than two electrodesIndexing code0
- H04Q 2213/305TransistorsIndexing code0
- H04Q 2213/306Ferro-electric elementsIndexing code0
- H04Q 2213/336Store and forwardIndexing code0
- H04Q 2213/338Do not disturbIndexing code0
- H04Q 2213/341Contactbank connectionsIndexing code0
- H04Q 2213/342General schemeIndexing code0
- H04Q 2213/344OverflowIndexing code0
- H04Q 2213/346Switch with inverted groupingIndexing code0
- H04Q 2213/347Nodal networkIndexing code0
- H04Q 2213/348Reservation of lines/channelsIndexing code0
- H04Q 2213/35Separate control and speech pathsIndexing code0
- H04Q 2213/352Self-routing switchIndexing code0
- H04Q 2213/353Map memoryIndexing code0
- H04Q 2213/366Integrated systemsIndexing code0
- H04Q 2213/372Intervention by operatorIndexing code0
- H04Q 2213/374PagingIndexing code0
- H04Q 2213/382Provisions for interexchange traffic in the local exchangeIndexing code0
- H04Q 2213/386Line concentratorIndexing code0
- H04Q 2213/388Saturation signalling systemIndexing code0
- H04Q 2213/39Channels assigned to subscribersIndexing code0
- H04Q 2213/393Channel interchangingIndexing code0
- H04Q 2213/402Ac outside voice bandIndexing code0
- H04Q 2213/403Voice frequencyIndexing code0
- H04Q 2213/407Push-button diallingIndexing code0
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