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ITU-T G.622 Characteristics of 1.2/4.4 mm coaxial cable pairs
ITU-T J.19 A conventional test signal simulating sound-programme signals for measuring interferences in other channels
ITU-T R.71 Organization of the maintenance of international telegraph circuits
ITU-T U.140 Definitions of essential technical terms relating to telegraph switching and signalling
ITU-T G.794 Characteristics of 24-channel transmultiplexing equipments
ITU-T S.13 Use on radio circuits of 7-unit synchronous systems giving error correction by automatic repetition
ITU-T T.441 Document transfer and manipulation (DTAM); Operational structure
ITU-T N.61 Measurements to be made before the line-up period that precedes a television transmission