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ITU-T R.36
ITU-T R.36 Report on voice-frequency telegraph channels for use above 50 bauds; Coexistence of 50-baud/120-Hz channels, 100-baud/240-Hz channels, 200-baud/360-Hz or 480-Hz channels on the same voice-frequency telegraph system
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ITU-T S Supplement 1
ITU-T S Supplement 1 Minimal specifications for the bilingual (arabic/latin) teleprinter
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ITU-T G.734
ITU-T G.734 Characteristics of primary synchronous digital multiplex equipment operating at 1544 kbit/s
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ITU-T N.21
ITU-T N.21 Limits and procedures for the lining-up of a sound-programme circuit
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ITU-T O.95
ITU-T O.95 Phase and amplitude hit counters for telephone-type circuits
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ITU-T R.80
ITU-T R.80 Causes of disturbances to signals in VFT channels and their effect on telegraph distortion
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ITU-T K.24
ITU-T K.24 Method for measuring radio-frequency induced noise on telecommunications pairs
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ITU-T Q.33
ITU-T Q.33 Protection against the effects of faulty transmission on groups of circuits
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ITU-T G.951
ITU-T G.951 Digital line systems based on the 1544 kbit/s hierarchy on symmetric pair cables
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ITU-T I.254.1
ITU-T I.254.1 Multiparty supplementary services : Conference calling (CONF)
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ITU-T U.4
ITU-T U.4 Exchange of information regarding signals destined to be used over international circuits concerned with switched teleprinter networks
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