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ITU-T J.11 Hypothetical reference circuits for sound-programme transmissions
ITU-T R.51bis Standardized text for testing the elements of a complete circuit
ITU-T U.24 Requirements for telex and gentex operation to be met by synchronous multiplex equipment described in recommendation R.44
ITU-T Q.2 Signal receivers for automatic and semi-automatic working, used for manual working
ITU-T G.747 Second order digital multiplex equipment operating at 6312 kbit/s and multiplexing three tributaries at 2048 kbit/s
ITU-T T.351 Imaging process of character information on facsimile apparatus
ITU-T S.6 Characteristics of answerback units (ITA2)
ITU-T Q.8 Signalling systems to be used for international manual and automatic working on analogue leased circuits
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 G.621 Characteristics of 0.7/2.9 mm coaxial cable pairs
ITU-T J.18 Crosstalk in sound-programme circuits set up on carrier systems