| Section 701-01: Forms of telecommunications |
| 701-01-01 | information | |
| 701-01-02 | signal | |
| 701-01-03 | transmission | |
| 701-01-04 | communication | |
| 701-01-05 | telecommunication | |
| 701-01-06 | telephony | |
| 701-01-07 | telegraphy | |
| 701-01-08 | telex (service) | |
| 701-01-09 | facsimile | |
| 701-01-10 | telewriting | |
| 701-01-11 | data | |
| 701-01-12 | data communication | |
| 701-01-13 | data transmission | |
| 701-01-14 | teleprocessing | |
| 701-01-15 | television | |
| 701-01-16 | telematics (services) | |
| 701-01-17 | videography | |
| 701-01-18 | broadcast videography | |
| 701-01-19 | videotex | |
| 701-01-20 | teletex (service) | |
| 701-01-21 | video-telephony | |
| 701-01-22 | teleconference | |
| 701-01-23 | audioconference | |
| 701-01-24 | videoconference | |
| 701-01-25 | telemetry | |
| 701-01-26 | telecommand | |
| 701-01-27 | telecontrol | |
| 701-01-28 | teleguidance | |
| 701-01-29 | telemonitoring | |
| 701-01-30 | remote alarm | |
| 701-01-31 | radiocommunication | |
| 701-01-32 | broadcasting | |
| 701-01-33 | broadcasting service | |
| 701-01-34 | sound broadcasting (service) | |
| 701-01-35 | television broadcasting | |
| 701-01-36 | cabled distribution | |
| Section 701-02: Channels, circuits and networks |
| 701-02-01 | transmission channel | |
| 701-02-02 | telephone-type channel | |
| 701-02-03 | telecommunication circuit | |
| 701-02-04 | telephone-type circuit | |
| 701-02-05 | (frequency) channel | |
| 701-02-06 | transmission link | |
| 701-02-07 | telecommunication network | |
| 701-02-08 | (telecommunication) terminal | |
| 701-02-09 | subscriber's line | |
| 701-02-10 | port (of a network) | |
| 701-02-11 | transmission path | |
| 701-02-12 | radio wave | |
| 701-02-13 | radio, adj | |
| Section 701-03: Use and operation of circuits and networks |
| 701-03-01 | connection | |
| 701-03-02 | complete connection | |
| 701-03-03 | switching (in telecommunication) | |
| 701-03-04 | call attempt | |
| 701-03-05 | call | |
| 701-03-06 | conversation, <in telecommunication> | |
| 701-03-07 | code | |
| 701-03-08 | modulation | |
| 701-03-09 | multiplexing | |
| 701-03-10 | demultiplexing | |
| 701-03-11 | multiple access | |
| 701-03-12 | space division | |
| 701-03-13 | time division | |
| 701-03-14 | frequency division | |
| 701-03-15 | code division | |
| 701-03-16 | simplex, adj and noun | |
| 701-03-17 | duplex, adj and noun | |
| 701-03-18 | unidirectional, adj | |
| 701-03-19 | bidirectional, adj | |
| 701-03-20 | one-way, adj | |
| 701-03-21 | both-way, adj | |
| 701-03-161 | simplex, adj | |
| 701-03-162 | simplex, noun | |
| 701-03-171 | duplex, adj | |
| 701-03-172 | duplex, noun | |