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ITU-T G.751 Digital multiplex equipments operating at the third order bit rate of 34 368 kbit/s and the fourth order bit rate of 139 264 kbit/s and using positive justification
ITU-T T.390 Teletex requirements for interworking with the telex service
ITU-T G.611 Characteristics of symmetric cable pairs for analogue transmission
ITU-T J.12 Types of sound-programme circuits established over the international telephone network
ITU-T R.52 Standardization of international texts for the measurement of the margin of start-stop equipment
ITU-T R.59 Interface requirements for 50-baud start-stop telegraph transmission in the maritime mobile satellite service
ITU-T U.44 Multi-address calls in real time for broadcast purposes in the international telex service
ITU-T G.761 General characteristics of a 60-channel transcoder equipment