transmission of telephone signaling

- acoustic imaging device
- active device
- add-in device
- adjusting device
- airplane speaking device
- airplane tape recording device
- alarm device
- all-in-one device
- amplifying device
- analyzing device
- ancillary device
- announcer's device
- answering device
- antenna-feeder device
- antenna-matching device
- antipumping device
- arithmetic device
- arresting device
- attention device
- audible signal device
- automatic program input device
- automatic voice-alert device
- automatic-matching device
- auxiliary call-doubling device
- auxiliary loud-speaking device
- auxiliary radio communication device
- balancing device
- beam-processing device
- buffer device
- burglar-alarm device
- cable device
- calling device
- call-routing device
- central chain data device
- central-control device
- central-intranetwork device
- channel device
- channel-adjusting device
- charge-injection device
- clamping device
- color-imaging device
- combinational device
- combined safety-alarm device
- combined-measuring device
- command-execution device
- command-transit device
- command-transmission device
- compact device
- composite-optoelectronic device
- conditional-access device
- conditioning device
- connecting device
- connection device
- contact-switching device
- control device
- control-calling device
- controlled semiconductor device
- controller device
- counting device
- damping device
- data collection device
- data transmission device
- data-input device
- data-interface device
- data-recording device
- decoding device
- digital device
- digital signal processing device
- discrete control device
- dispatch device
- display device
- doubling device
- dual-tone ringing device
- duplex amplifier bypass device
- duty-reception device
- earthing device
- eavesdropping device
- edge device
- electrodynamical device
- electromagnetic device
- electronic device
- electronic-listening device
- electronic-relay device
- electronic-telegraph device
- electrostatic device
- emergency control device
- error-protecting device
- executive device
- facsimile device
- fast acting device
- fast action device
- fax machine memory device
- ferrite device
- ferrodynamical device
- ferrostatic device
- fiber-optic branching device
- fiber-optic interconnection device
- film optical-sensing device
- filter-matching device
- focusing device
- four-layer device
- four-terminal device
- frequency converting device
- frequency encoding device
- frequency-selective device
- full four-terminal device
- functional device
- gas-discharge device
- groove locating device
- heat device
- IC device
- image-display device
- imaging device
- independent device
- independent-calling device
- independent-telegraph device
- indicating device
- indicator device
- induction device
- in-line device
- input device
- input/output device
- input-isolating device
- input-output device
- input-protector device
- interface device
- interlocking device
- intermediate device
- isotropic device
- laser receiving device
- laser transmitting device
- level control device
- light alarm device
- light-sensitive device
- line HF-device
- linear device
- linear four-terminal device
- line-mounting device
- load device
- locking device
- lockout-signaling device
- logical device
- low-noise start-control device
- low-noise start-controlling device
- low-voltage device
- magnetic device
- magnetic tape sound recording device
- magnetic-wave device
- magnetoelectric device
- magnetoelectronic sparkproof device
- master device
- matching device
- measuring device
- mechanical switching device
- memory device
- message broadcasting device
- metering device
- microelectronic device
- microphone switching device
- mobile speaking device
- modem encryption device
- motor synchronizing device
- multicommunications device
- multifunction device
- multirange measuring device
- n-color device
- network section checkout device
- network synchronizing device
- noncontrolled semiconductor device
- nonlinear four-terminal device
- numbered data requiring and receiving device
- on-off device
- optical-to-optical interface device
- optimal receiving device
- optoelectronic device
- output device
- partial four-terminal device
- partially-controlled semiconductor device
- passive device
- peripheral control device
- peripheral device
- persistent-image device
- phase sensitivity protecting device
- phase shifting device
- photoconductive device
- photoelectric device
- photoemissive device
- photogalvanic device
- photosensitive device
- photothyristor electronic device
- planar device
- polarized device
- power supply device
- primary signal device
- printing device
- protection device
- protective cutout device
- pulse distributing device
- pulse firing device
- pulse semiconductor device
- pulse shortening device
- radio broadcasting device
- radioelectronic device
- real device
- receiving device
- recognition device
- recovering device
- regulating device
- release device
- remote alarm device
- remote control device
- remote network tripping device
- remote positioning device
- remote signaling device
- reserve switching device
- restricted radiation device
- ringing device
- rotary device
- routing device
- safety device
- safety-alarm device
- scanning device
- sealed distribution device
- selective call device
- semiconductor device
- semiconductor switching device
- sensing device
- signal transducing device
- signaling control device
- signaling device
- silicon imaging device
- single chip alarm device
- sizing device
- slave device
- solid optoelectronic device
- spark-protecting device
- spark-safe testing device
- speaking device
- special phototelegraph device
- spectrum transfer device
- start-control device
- start-controlling device
- starter-controlled device
- static protection device
- station HF-device
- stationary station automatic selection device
- stationary-electrical device
- storage device
- strobing device
- subscriber distribution device
- supporting device
- suppression device
- surface acoustic wave device
- surface communication device
- switching device
- sync device
- synthesized-radio device
- tap changing device
- tapping device
- tariff device
- telecontrol device
- teledata transmission device
- telegram format conversion device
- telemetric transmission device
- telephone device
- telephone periphery device
- telering device
- teletex device
- terminal device
- terminal telegraph device
- test device
- thermal regulation device
- three-terminal device
- threshold device
- time-delay device
- timing device
- touch-input device
- transceiving diving device
- transcient telegraph device
- transit device
- transmitter connecting device
- transmitting device
- trunk-encryption device
- two-terminal device
- ultrasonic imaging device
- universal calling device
- universal telegraph device
- videotex device
- voice-control device
- voice-operated gain-adjusting device
- voltage-sensing device
- warning device
- wire speaking device
- wireless speaking device

- aerial cable
- areal cable
- armored-unrelay submarine cable
- AV cable
- balanced station cable
- block cable
- branch-feeder cable
- breakout cable
- buried cable
- camera cable
- city cable
- coaxial distributing cable
- coaxial submarine cable
- coaxial-combined cable
- coil-loaded cable
- combinational cable
- communication cable
- compact-coaxial cable
- composite cable
- concentric cable
- connection cable
- continuously-loaded cable
- control cable
- coupling cable
- deep-water cable
- degaussing cable
- direct-buried cable
- distribution cable
- diving telephone cable
- drive cable
- dual-coaxial cable
- duplex cable
- electric communication cable
- entrance cable
- exchange cable
- extension cable
- fanout cable
- feeder cable
- fiber-optic cable
- first transatlantic cable
- fluoroplast-insulated cable
- handset cable
- hanged fiber-optic cable
- high-frequency cable
- hybrid cable
- intelligent cable
- interlay cable
- interoffice cable
- intraareal cable
- JEF-LAP cable
- jumper cable
- Kimber cable
- leader cable
- lead-sheathed cable
- LF cable
- light-guide cable
- line cable
- local cable
- long-distance communication cable
- low-frequency cable
- main cable
- marine cable
- messenger cable
- microphone cable
- microwave cable
- modem bypass cable
- multifiber cable
- multimode cable
- multipaired HF-cable
- N-conductor cable
- n-fiber cable
- nonmetallic fiber-optic cable
- n-quad cable
- null-modem cable
- optical-fiber cable
- optical-subscriber cable
- paired cable
- PE-cable
- pilot cable
- power cable
- pulse cable
- quadded cable
- radio-frequency cable
- ribbon cable
- screened cable
- sealed cable
- second transatlantic cable
- self-carrying fiber-optic cable
- semiflexible cable
- shielded connecting cable
- signal cable
- single-coaxial cable
- single-fiber cable
- single-quad HF-cable
- spiral four cable
- standard cable
- stub cable
- studio cable
- submarine telegraph cable
- submarine telephone cable
- subriverine cable
- subscriber's cable
- superconducting cable
- supply cable
- suspension cable
- symmetrical cable
- telegraph cable
- telephone cable
- telephone-signaling cable
- tested cable
- thermocouple cable
- thousand-fiber cable
- three-core cable
- tie cable
- transceiver cable
- transmission line cable
- triaxial cable
- trunk cable
- tunnel cable
- TV-aerial cable
- twin cable
- twinaxial cable
- two-hundred fiber cable
- unarmored relay submarine cable
- underwater rubber-sheathed cable
- video cable

- acoustic alarm system
- acoustic image system
- acoustic systems
- actiontrack system
- active IR-system
- actuator system
- adaptive communication system
- adaptive teleinformation system
- adaptive telemetering system
- advanced information system
- Afsatcom system
- air system
- aircraft intercommunication system
- airfield communication system
- air-ground automatic system
- airline reservation system
- air-to-ground TV system
- alarm signal system
- alarm system
- all-channel signaling system
- ALL-IN-ONE system
- alphanumeric system
- amplified speaker system
- amplitude shift-keying system
- AMPS system
- analog cellular communication system
- analog cellular system
- analog component video system
- analog television system
- analog tropospheric system
- anisochronous system
- antenna system
- antitheft system
- AR system
- Arabsat system
- ASK system
- associated channel analog system
- asynchronous address communication system
- audio recording system
- Aurora system
- Aussat system
- automatic communication system
- automatic connection establishment system
- automatic control system
- automatic data acquisition system
- automatic telegraphy system
- automatic telephone system
- automatic tuning system
- automatized cellular system
- auxiliary alarm system
- balanced cable transmission system
- band sharing system
- base station system
- baseband system
- basic input/output system
- bass-reflex speaker system
- batch processing system
- batch transmission system
- batch-and-forward system
- batteryless system
- bilateral CTV system
- binary tariff system
- biocontrol system
- bit parallel interface system
- bit transport system
- bridge duplex system
- broadband mobile system
- broadcast satellite system
- broadcasting delivery media systems
- burglar alarm system
- byte-serial interface system
- cabinet system
- cabinetless system
- cable distribution system
- cable TV system
- call-accounting system
- call-answering system
- call-counting system
- call-distributing system
- call-processing system
- call-queueing system
- camp-on system
- CAPTAIN system
- car component audio system
- carrier reinsertion system
- carrier system
- carrier-communication system
- carrier-current communication system
- Cassegrain-Schmidt system
- cassette recording system
- cassette reproducing system
- CATRIN system
- caution system
- CD 900 system
- cellular system
- cellular-radio system
- central-battery system
- centralized control system
- chirp binary telegraph system
- cipher system
- circuit switched telecommunication system
- circuit switching telecommunication system
- circular telecontrol system
- clock system
- closed-circuit communication system
- closed-circuit telegraph system
- closed-numbering system
- code-dependent system
- code-division multiple access system
- code-independent system
- code-insensitive system
- code-sensitive system
- coding system
- coherent fiber-optic system
- collimating system
- collocated system
- color separating system
- combined numbering system
- combined power supply system
- combined satellite communication system
- common-battery system
- common-carrier system
- common-channel signaling system
- common-engineering communication system
- common-purpose cellular system
- common-using band system
- common-using cordless telephone system
- common-using paging system
- communication system
- communication traffic system
- communications system
- community antenna system
- community antenna television system
- community TV-system
- commununication switching system
- compact disk digital audio system
- compatible color television system
- compatible single sideband system
- compatible single-band system
- compatible TV-system
- complex radio communication system
- computer vision system
- computer-telephone system
- Comsar system
- Comsat system
- Conax system
- concentrated-insonation system
- conference system
- conference-communication system
- congested system
- congress-class system
- constant-current system
- control generating system
- conventional television system
- Conversant system
- cordless-communication system
- crossbar system
- crossed-coincident microphone system
- Crosspoint system
- CSE system
- C-system
- cubical video projecting system
- data processing system
- data system
- data transport system
- data-collection system
- data-compression system
- data-exchange system
- dataflow system
- data-gathering system
- data-handling system
- data-measuring system
- data-reduction system
- data-transmission system
- Decca Navigator system
- DECfax system
- decision-feedback system
- dedicated control channel system
- dedicated multimedia system
- delta-sigma system
- deluxe presentation system
- departmental communication system
- desktop-video system
- DFS/Copernicus system
- dial-telephone system
- differential phase shift-keying system
- differential-duplex system
- differential-magnetic system
- digital camera system
- digital hybrid-key telephone system
- digital mass storage system
- digital microwave radio transmission system
- digital telephone communication system
- digital transmission system
- digital TV-communication system
- Digital UNIX system
- digital-analog system
- digital-cellular system
- digital-data modulation system
- digital-effect system
- digital-message entry system
- digital-termination system
- direct-broadcasting satellite system
- directing system
- direct-modulation system
- direct-sequence system
- direct-telephone communication system
- discrete communication system
- discrete sound system
- discrete-addressing system
- disk-operating system
- DISOSS system
- dispatch telephone communication system
- dispatch-center system
- dispersed-insonation system
- distributed-insonation system
- distributed-processing system
- documental-type communication system
- Dolby systems
- domestic satellite communication system
- double-band telephone communication system
- double-channel transmission system
- double-current transmission system
- double-pole communication system
- double-sideband large carrier system
- DSCS system
- D-system
- dual-cable system
- dual-reflector system
- duplexed system
- Earth-to-space transmission system
- ECM system
- electric communication system
- electronic antishock system
- electronic data-gathering system
- electronic data-processing system
- electronic-message system
- electronic-scanning system
- electronic-switching system
- Ellipso system
- emergency telephone communication system
- emergency-broadcast system
- EMX system
- equidistant system
- error-correction system
- error-detection system
- Eutelsat system
- extensible system
- external paging system
- facsimile system
- fast-acting servicing system
- fault-tolerant system
- fax communication system
- fax transmitting system
- feed system
- fiber transmission system
- fiber-optic transmission system
- field-sequential system
- final mile system
- finishing system
- fire alarm system
- fire warning system
- first generation cellular system
- five-channel communication system
- fixed satellite system
- Flexcam system
- flexible access system
- Flitsatcom system
- focusing system
- four-channel sound system
- four-dimensional system
- four-wire telephone communication system
- frame-sequential system
- frequency shift-keying system
- frequency-carrier system
- frequency-control system
- front-bass reflex speaker system
- fully digital system
- gate system
- Gaussian system
- generalized system
- generating dynamic system
- generator-dc-motor system
- GIGASET radio system
- global positioning system
- Global system
- Gopher system
- grandfathered system
- group-alerting and dispatching system
- guide system
- hard-wired CCTV system
- hazard system
- helical-scan system
- HF-synchronizing system
- high-precision navigating system
- Hi-linear system
- home system
- home-telephone system
- home-type system
- homing-guidance system
- host system
- hydroacoustic system
- ideal communication system
- idealized system
- image informaion system
- image-forming system
- immedial servicing system
- incompatible system
- independent system
- information retrieval system
- information system radio system
- information system
- information-feedback system
- information-measuring system
- infrared alarm system
- Inmarsat system
- Inmarsat-A system
- Inmarsat-B system
- Inmarsat-C system
- Inmarsat-D system
- Inmarsat-M system
- Inmarsat-P system
- integrated telephone system
- integrated videographic teleconferencing system
- integrated-antenna system
- integrated-communication system
- integrated-modulation system
- integrated-office system
- Intelsat system
- interactive system
- intercarrier-sound system
- intercommunication system
- intercontinental tropospheric system
- interlock system
- intermachine exchange system
- intermediate system
- international communication system
- interphone system
- Intervision system
- intraband signaling system
- intruder alarm system
- inward-outward dialing system
- ionoscatter system
- ionosphere sounder system
- ionospheric system
- Iridium system
- isolated system
- Italsat system
- J-carrier system
- joint-multichannel trunking and switching system
- K-carrier system
- key system
- key-telephone system
- land satellite communication system
- large-grained communication system
- laser communication system
- L-band satellite system
- L-carrier system
- Leasat system
- lightning protection system
- limited distortion system
- line amplifiers system
- link system
- little-channel relay system
- local alarm system
- local battery system
- local communication system
- local radio paging system
- long-haul system
- long-range system
- loop system
- loud-speaking communication system
- low-traffic system
- magnetic tape recording system
- Mail system
- management-information system
- manual cellular system system
- manual telephone set system
- Marisat system
- master television system
- master-antenna television system
- matrix sound system
- message feedback system
- message procession system
- message registration system
- message-switched system
- meteor radio system
- Metrobus system
- micro component system
- Micro Press Cluster Printing system
- micro-lens system
- microprocessor system
- microwave relay system
- midi system
- mine radio telephone system
- mini system
- mixed media system
- mixed numbering system
- mobile cellular communication system
- mobile land communication system
- mobile radio system
- mobile relay system
- mobile system
- modulated system
- monetary mobile system
- MS-Mail system
- multiareal system
- multicassette system
- multichannel telephone system
- multicomputer system
- multidisk system
- multiformat recording system
- multifrequency tone signaling system
- multiguard system
- multilevel mixed system
- multimedia system
- multiple-channel system
- multiqueue system
- Multiscrypt system
- multistandard system
- multitrack editing system
- mutibeam antenna system
- muting system
- Nagravision system
- NAMTS system
- narrow-angle TV system
- national communication system
- navigation system
- n-channel communication system
- n-channel DPSK system
- n-channel transmission system
- network standalone system
- network system
- network-operation system
- networks numbering system
- neutral direct-current telegraph system
- n-head video system
- NMT system
- noise-reduction system
- nonhoming tuning system
- noninterlaced television system
- nonsegmented system
- Norsat system
- n-satellite system system
- n-tone DPSK system
- n-tone MFSK system
- NTSC system
- NTT system
- obligatory message system
- Odyssey system
- off-line system
- on-line computer system
- on-line secured system
- open numbering system
- open system
- operative-engineering communication system
- opposite signals system
- optical-communication system
- optical-information system
- optical-projection system
- optoelectronic system
- oscillating system
- oscillation system
- outband signaling system
- package-and-resource tracking system
- pagemaster system
- paging system
- PAL system
- parametric system
- PATHWORKS system
- pattern recognition system
- personal holding guard system
- phase shift-keying system
- phone system
- Piccolo system
- pilot-controller system
- polar direct-current telegraph system
- portable mobile system
- power control system
- power controlling system
- power-line carrier system
- power-supply system
- press-to-talk system
- Prestel system
- primary-supply system
- privacy system
- private branch paging system
- private movable system
- private videodata system
- private videotex system
- process-interface system
- PROFS system
- programmable cross-connect system
- programmable cross-connected system
- programmed radio system
- prompting system
- protected wireline distribution system
- protection system
- pseudoquadraphony system
- pseudotrunking system
- public videodata system
- public videotex system
- pulse-code system
- pulse-frequency system
- pulse-time system
- quadraphonic sound system
- quadruple-diversity system
- R1 system
- R2 system
- radio buoy system
- radio command system
- radio communication system
- Radio Data system
- radio facsimile system
- Radiocom 2000 system
- radio-control system
- radio-paging system
- radio-relay system
- radiosonde-radio-wind system
- radio-telemetering system
- real time pulse-echo system
- real time system
- receiver lockout system
- recording system
- recovery system
- redundant system
- reference-information system
- regional electronic payment system
- relay-radio system
- remote concentrating system
- remote control system
- remote diagnostic system
- remote information system
- remote semiconcentrating system
- remote sensing system
- remote signaling system
- rendering system
- rerecording system
- reserved servicing system
- RF/Transmission system
- rotary system
- safety alarm system
- safety system
- Satcom system
- satellite comminication system
- satellite marine comminication system
- Satellite Master Antenna Television system
- satellite radio system
- satellite-aircraft communication system
- SB-communication system
- SBL communication system
- scalable system
- scanning trunking system
- SCO UNIX system
- searchless identification system
- seat reservation system
- SECAM system
- second generation cellular system
- second room system
- secondary supply system
- secrecy system
- section communication system
- security system
- segmented system
- seismic system
- selective calling system
- selective frequency base station system
- selective protective system
- selective telephone system
- self-adjusting system
- self-balancing differential system
- self-contained system
- self-test system
- selsyn system
- semiautomatic-switching system
- semiautomatized cellular system
- sensory system
- servo system
- shadow-batch system
- short-haul microwave system
- Sicral system
- Sigma Servo system
- signal system
- simplex movable system
- single-band transmission system
- single-busbar system
- single-cable communication system
- single-cable system
- single-channel system
- single-current transmission system
- single-pulse tracking system
- Skynet system
- small-grained communication system
- SmarTrunk II radio communication system
- solid-state uninterruptible power battery system
- Sony bus system
- sound alarm system
- sound equalization system
- sound navigation system
- sound reinforcement system
- sound warning system
- space-division system
- space-switched system
- spark-safe system
- speaker system
- special communication system
- speech-processing system
- speech-recognition system
- split-speaker system
- spread-spectrum system
- stabilizing system
- stage monitoring system
- standalone double point system
- star-circuit system
- STAREX CMX system
- starting communication system
- start-stop system
- stationary satellite system
- step-by-step system
- stereo sound system
- stereophonic sound system
- storage system
- storage-and-retrieval system
- Strowger system
- submarine fiber-optic system
- subprimary digital transmission system
- subscriber carrier system
- subscriber switching system
- suffix system
- Supersat system
- supervisory control system
- surround sound system
- switched telecommunication system
- switching system
- sync communication system
- synchro system
- synchronous communication system
- synchronous digital system
- TAGS system
- tandem system
- tariffication system
- T-carrier system
- TDF system
- teleautomatic system
- Telecom system
- telecommunication system
- telecommunications system
- telecommunication-service priority system
- telecommunications-service priority system
- telecontrol system
- telemechanic system
- telemetering system
- telemetry system
- telephone system
- telephone-answering system
- telephone-communication system
- telephone-communications system
- teleprocessing system
- Telesat system
- teletex system
- teletypewriter system
- television-telephone system
- Tele-X system
- Telsar system
- terminal system
- terrestrial radio-relay system
- theft-prevention system
- thin-route system
- third generation communication system
- three-axle stabilizing system
- three-channel HF-telephone system
- three-channel transmission system
- three-color system
- three-lens optical system
- three-primary system
- three-wire system
- time-dissemination system
- time-frequency hopping system
- time-switched system
- total access communication system
- total area coverage system
- transmission system
- trichromatic system
- triple-interlace system
- triplex system
- trunk communication system
- TV-observation system
- twelve-channel transmission system
- two-arm system
- two-band system
- two-color system
- two-roller transfer system
- two-step control system
- two-way CATV system
- two-way system
- two-wire telephone communication system
- ultra-match system
- ULTRIX system
- unified radioaccess system
- unilateral-control system
- unilateral-synchronization system
- uninterruptible-power system
- Unisat system
- universal alarm system
- universal-battery system
- universal-electronic system
- universal-movable system
- Uniworks system
- vestigial-sideband system
- video editing system
- video home system
- video recording system
- videocom system
- videoteleconference system
- videotex system
- virtual studio system
- vision system
- vocoder system
- voice dialog system
- voice frequency carrier telegraph system
- voice modulation system
- voice post system
- volume control system
- waiting system
- warning system
- watch system
- watching system
- waterside facsimile communication system
- wave-propagating system
- wide-angle TV system
- Winfax Pro system
- wired broadcasting system
- wireless CCTV system
- wireless home system
- wireless infrared speaker system
- wire-radio communication system
- XY system
- zone-selective protection system
- zoning system

- adjacent channel
- aeronautical emergency channel
- air channel
- air-air channel
- air-ground channel
- allocated channel
- alpha channel
- analog channel
- analog data channel
- associated channel
- associated signaling channel
- asynchronous channel
- audio channel
- automatic's line channel
- auxiliary channel
- average-speed signaling channel
- backward channel
- balanced channel
- band-limited channel
- base cable channel
- base RF-channel
- baseband channel
- B-channel
- bidirectional interaction channel
- bidirectional intercom channel
- binary symmetric channel
- binomial channel
- blank channel
- block multiplexor channel
- blue channel
- branching channel
- brightness channel
- broadband channel
- broadband multiplexing channel
- broadcast TV-radio channel
- buffered I/O channel
- bypass channel
- byte-multiplexor channel
- cable channel
- calling channel
- camera channel
- carrier-current channel
- chroma channel
- chrominance channel
- clear channel
- coherent channel
- color channel
- color-difference channel
- color-sync channel
- common-user channel
- communication channel
- complex high-frequency line channel
- confidence channel
- continuous channel
- continuous-discrete channel
- control channel
- covertness-protected channel
- cue channel
- data transfer channel
- data transmission channel
- D-channel
- D-echo channel
- dedicated channel
- deep-sound channel
- delta channel
- department communication channel
- digital data channel
- direct channel
- direct control channel
- direct receiving channel
- direct satellite channel
- discrete channel
- discrete-continuous channel
- dispatch communication channel
- double-pole channel
- drop-insertion channel
- duplex communication channel
- E-channel
- electric communication channel
- electric protection channel
- elementary channel
- emergency-radio channel
- engineering channel
- enhanced discrete channel
- even channel
- exchange channel
- fast channel
- fast-acting channel
- fax-modem channel
- feedback channel
- fiber optic communication channel
- firing channel
- fixed-tuned channel
- forcible-borrowed channel
- forward channel
- forward wideband delivery channel
- four-wire channel
- frequency signaling channel
- full-rate traffic channel
- green channel
- group channel
- guard channel
- half-duplex channel
- half-rate traffic channel
- H-channel
- head channel
- health channel
- HF broadband channel
- HF multiplexed channel
- high voltage aerial cable line channel
- highest grade channel
- high-frequency channel
- high-speed signaling channel
- high-voltage aerial line channel
- high-voltage cable line channel
- high-voltage tone line channel
- hydroacoustic channel
- I channel
- ideal channel
- image channel
- in-band orderwire channel
- induced channel
- information bearer channel
- information channel
- infrared channel
- input channel
- input-output channel
- interaction channel
- intercepting-protected channel
- interference channel
- intermodulation channel
- internal phase channel
- internal wire channel
- intrabasin channel
- intradistrict telegraph channel
- intraregional telegraph channel
- ionospheric channel
- isolated bundled phase channel
- jamming channel
- labeled channel
- labeled-statistical channel
- leased channel
- left front channel
- left rear channel
- left stereophonic channel
- line channel
- linear random channel
- line-of-sight channel
- local channel
- logical channel
- long-communication bypass channel
- long-distance channel
- low-frequency channel
- luminance channel
- M channel
- marine radio communication channel
- memory channel
- memoryless channel
- meteor-burst channel
- mobile communication channel
- monochrome channel
- multipath channel
- multiplexing channel
- noiseless channel
- noisy channel
- noncoherent channel
- nonfixed channel
- nonswitched channel
- nonsynchronous channel
- off-hook channel
- one-piece channel
- one-way channel
- open channel
- optimal channel
- optoelectronic channel
- ordinary channel
- outband channel
- output channel
- parallel access channel
- parallel optical channel
- parasitic channel
- peripheral-interface channel
- phase line channel
- phase-phase pitch line channel
- physical channel
- picture channel
- pilot channel
- pipeline control channel
- pitch communication channel
- planar channel
- positioned channel
- primary channel
- protection channel
- Q channel
- quadrature channel
- radio communication channel
- radiotelegraph channel
- radiotelephone channel
- read/write channel
- reception channel
- red channel
- relay channel
- relay protected channel
- return channel
- reverse channel
- reverse control channel
- Ricean channel
- right channel
- right front channel
- right rear channel
- right stereophonic channel
- road safety channel
- road servicing channel
- S channel
- safety channel
- satellite communication channel
- scatter channel
- secondary channel
- selector channel
- send channel
- sensor channel
- separate resonance channel
- series optical channel
- service communication channel
- shared channel
- ship-to-shore channel
- shore-to-ship channel
- side channel
- signal channel
- signaling channel
- single-beam channel
- single-ended channel
- slow channel
- slow-acting channel
- sound broadcasting channel
- sound channel
- space-craft channel
- special cable-line channel
- speech channel
- standard broadcast channel
- subvoice grade channel
- sum channel
- supervisory channel
- switched channel
- symmetrical channel
- synchronous channel
- telecommunication channel
- telemechanic channel
- telemetering channel
- telephone channel
- television channel
- time-derived channel
- toll cable channel
- tone frequency channel
- top channel
- traffic channel
- train dispatch communication channel
- train radio communication line channel
- transfer channel
- transmission channel
- transmission service channel
- transparent channel
- trunk channel
- TV-frequency channel
- TV-observation channel
- two-wire channel
- video channel
- virtual signaling channel
- voice channel
- voice-band channel
- waste channel
- wave channel
- wire communication channel
- wireless channel
- working channel
- write channel

- access line
- acoustic delay line
- acoustic line
- active line
- adjustable line
- air-strip transmission line
- air-suspend strip line
- alternate-phone line
- analog-junction line
- artificial-cable line
- artificial-transmission line
- associated line
- asymmetrical digital subscriber line
- audio-communication line
- automatic binary data link line
- available line
- backbone line
- balanced aerial line
- balanced cable line
- balanced line
- balanced transmission line
- beaded-transmission line
- branch bus line
- branch line
- bridging line
- bus line
- busy line
- cable line
- called line
- calling line
- carrier line
- central-office line
- coaxial line
- coaxial-cable line
- coaxial-transmission line
- common-talking line
- common-use line
- communication line
- compressed SLIP line
- contact-wire line
- control line
- coplanar transmission line
- coupled-transmission lines
- crawl line
- current line
- customer line
- data line
- data-conversion line
- data-transmission line
- dc line
- dead line
- dedicated line
- delay line
- dial line
- dialed line
- dial-up line
- digital active line
- digital delay line
- digital junction line
- digital relay line
- direct line
- disconnected line
- disengaged line
- distributed line
- drive line
- dual-use line
- end line
- exchange line
- exciting line
- exclusive line
- executive line
- exponential-transmission line
- extended-subscriber line
- external communication line
- faulted line
- feed line
- few-channel relay line
- fiber-optic communication line
- flyback line
- Fucashime-to-Camae line
- ground-return line
- hairpin line
- half-wave transmission line
- helix line
- helix-transmission line
- home line
- horizontal line
- hot line
- idle line
- inactive line
- incoming local line
- incoming trunk line
- individual line
- Indonesia-to-Singapore coaxial-cable line
- inductive-communication line
- interconnection line
- internal communication line
- internal connection line
- international communication line
- interswitchboard line
- intraareal relay line
- inverted-microstrip line
- land line
- leased line
- Lecher line
- limiting mode line
- link line
- load line
- local cable line
- local line
- locked-in line
- long line
- long-distance line
- loss-free line
- lossy line
- lunar line
- magnetostatic delay line
- main line
- main radio relay line
- matched transmission line
- microslot line
- microstrip line
- microwave acoustic delay line
- mismatch-slotted line
- multidrop line
- multistation party line
- multiterminal line
- nonresonant line
- nonshielded transmission line
- nonuniform transmission line
- n-wire subscriber line
- offnet access line
- open-circuited line
- open-phase line
- outer communication line
- outgoing line
- outward line
- Pacific Ocean cable line
- party line
- phase-compensating line
- phasing line
- physical line
- pipeline-microwave line
- point-to-point line
- poor quality line
- printer line
- private line
- public line
- quarter-wave line
- quartz delay line
- radio-frequency line
- radio-frequency transmission line
- receiving line
- reflection line
- relay line
- remote subscriber line
- reporting line
- reserved line
- retrace line
- return line
- ring power transmission line
- road communication line
- scan line
- scanning line
- semipermanent line
- shielded transmission line
- signal line
- signaling line
- single-cable communication line
- single-interval tropospheric line
- single-subscriber line
- single-wire communication line
- single-wire line
- slotted line
- sonic delay line
- space communication line
- special-grade access line
- spectrum line
- strip line
- strip transmission line
- strobe line
- stub-supported line
- submarine line
- submarine-cable line
- subscriber line
- surface wave line
- surface wave transmission line
- T1 line
- T3 line
- tapped-delay line
- telecommunication line
- telegraph line
- telephone line
- terrestrial line
- three-cable communication line
- tie line
- toll line
- transatlantic fiber optic communication line
- transatlantic telephone line
- transocean-telegraph line
- transverse-junction line
- traveling line
- tropospheric line
- trunk junction line
- trunk line
- tunnel guide line
- TV-line
- two-cable communication line
- two-wire communication line
- two-wire line
- two-wire-rail line
- unbalanced line
- unbalanced transmission line
- uniform line
- uniform transmission line
- waiting line
- waveguide line
- wire line

- analog subscriber set
- answer relay set
- antisidetone set
- ASCII-character set
- automatic zero set
- auxiliary communication type set
- beacon set
- bridging set
- callback-telephone set
- channel set
- character set
- coded-character set
- command set
- common-battery set
- conference set
- conference-communication set
- converter set
- cord set
- cradle set
- crystal set
- customer set
- data set
- device-control code set
- dial-telephone set
- dictaphone set
- digital subscriber set
- direct-data set
- discharging set
- domestic-television set
- duplex-trunk communication set
- executive set
- expansion set
- extension set
- fiber-optic terminal set
- four-wire set
- freehand set
- frequency changer set
- G1 code set
- G2 code set
- generating set
- ground-to-airplane UHF-communication set
- handset set
- hybrid set
- incoming set
- industry TV-set
- infrared-communications set
- interface set
- key set
- key-telephone set
- language set
- LH-termination set
- local battery telephone set
- local communication set
- long distance dial set
- loud-speaking communication set
- magnet telephone set
- magneto telephone set
- manual telephone set
- matching relay set
- mosaic graphic set
- noise/interference set
- noise-immune set
- nontemporary data set
- null set
- n-wire set
- open-standard digital television set
- operator's set
- outgoing set
- paging telephone set
- paired subscriber's set
- paired telephone set
- PBX components set
- personal hearing set
- polar set
- polar-battery set
- primary group converting set
- primary trunking set
- projection set
- push-button set
- quaternary trunking set
- radiac set
- radio set
- radiosonde set
- receiving set
- relay set
- resistance set
- satellite communication set
- searching signaling set
- selective communication set
- SHF-antenna set
- simplex trunk communication set
- speaking devices set
- standard code set
- standard cord set
- station-master assistant set
- subaudio telegraph set
- subscriber set
- subscriber's cord set
- telegraph set
- telephone set
- television set
- temporary data set
- terminating set
- terrestrial satellite radio set
- tester set
- time-signal set
- tone dialing set
- transmission measuring set
- transmission test set
- transmitting set
- transponder set
- trunk communication set
- UHF-device set
- universal cord set
- universal relay set
- USB-set
- user's set

- adaptive current-controlled key
- All Messages key
- alphameric key
- alphanumeric key
- analog key
- answering key
- Answering Unit Lock key
- Answering Unit On key
- Ant key
- arrow keys
- assignment key
- Asterisk key
- Audio Mixing key
- authentication key
- Auto Store key
- Band key
- break key
- bridge key
- busy key
- calibration test key
- call key
- calling key
- cam key
- Cancel key
- Caps Lock key
- caption key
- Carriage return key
- check key
- chroma key
- ciphering key
- Clear key
- clearing key
- closed key
- code key
- collector key
- Confidential Mailbox key
- contactless key
- contactor key
- Contrast key
- Contrast selector key
- Control key
- Copy key
- Cut-in key
- Cut-out key
- Darker key
- Dedicated-Message key
- Delayed-Polling key
- Delayed-Transmission key
- Delete key
- dial key
- Dial Tone key
- digital keys
- Directory key
- disk key
- Display/Clock key
- diver-telephone key
- DT key
- DUB key
- electronic key
- enciphering key
- encryption key
- End key
- Energy Saver key
- Enter key
- Erase key
- Esc key
- Escape key
- Extra key
- F1 key
- F2 key
- F3 key
- Fade-in key
- Fade-out key
- feed key
- Fine key
- Flash key
- function key
- functional key
- Game/Digital Preset keys
- Greeting Rec key
- Greeting Recording key
- Greeting Select key
- Halftone key
- Halftone selector key
- Handsfree key
- hanged key
- Headset key
- Help key
- HI-LITE key
- Hold key
- Home key
- identification key
- Insert key
- integral key
- intelligent key
- interruption key
- lighted key
- line disconnection key
- Line Spacing key
- linear feedback key
- listening and speaking key
- load key
- Local Mode On key
- locking key
- Lower key
- magnetic key
- mail box key
- measure key
- menu key
- M-key
- Mode key
- monitoring key
- mono/tuner key
- Mute key
- Navi key
- new message key
- Num Lock key
- numbered key
- n-wire key
- open key
- open/close key
- operating key
- optron key
- P+/P-keys
- Page Down key
- Page Up key
- Party Line Ringing key
- Pause Break key
- Pause key
- Phase key
- plug key
- Polarity key
- power key
- previous program key
- Print Screen key
- Priority key
- private key
- programmable key
- protection key
- public key
- pulsing key
- Recall key
- RECEIVE MODE key
- receiving key
- Reception key
- Reception mode key
- Reception/Transmission key
- Reception/Transmission mode key
- redial key
- Redial/Pause key
- reed key
- Relay Broadcast key
- releasing key
- Repeat key
- Reperforator ON/OFF key
- Report key
- Reset key
- Resolution key
- Resolution selector key
- reverse key
- ring-back key
- ringing key
- running key
- Scroll key
- Scroll Lock key
- Search key
- selector key
- semiconductor key
- sending key
- session key
- SET key
- Shift key
- signaling key
- Skipping key
- slave key
- soft key
- SOUND MODE key
- sounder key
- Space key
- speaking key
- specific key
- splitting key
- Stamp key
- STANDBY key
- Start key
- Stop key
- stopless key
- Store key
- Super key
- switch key
- Switch Teletext ON/OFF key
- switching key
- Tab key
- Tabulation key
- Talk key
- talk ringing key
- talking key
- tape eject key
- telegraph key
- Telephone Registration key
- thyristor key
- Tone key
- transfer key
- transistor key
- Transmission Speed Selector key
- TTI key
- Tuner/Band key
- Turbo-dial key
- turn key
- unique key
- User Data key
- User Sw. key
- V-key
- Volume key
- Yes/No keys