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ITU-T Q.8 Signalling systems to be used for international manual and automatic working on analogue leased circuits
ITU-T G.621 Characteristics of 0.7/2.9 mm coaxial cable pairs
ITU-T G.755 Digital multiplex equipment operating at 139264 kbit/s and multiplexing three tributaries at 44736 kbit/s
ITU-T Q.110 General aspects of the utilization of standardized CCITT signalling systems on PCM links
ITU-T J.18 Crosstalk in sound-programme circuits set up on carrier systems
ITU-T R.58bis Limits on signal transfer delay for telegraph, telex and gentex networks
ITU-T U.74 Extraction of telex selection information from a calling telex answerback
ITU-T G.793 Characteristics of 60-channel transmultiplexing equipments
ITU-T S.12 Conditions that must be satisfied by synchronous systems operating in connection with standard 50-baud teleprinter circuits