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ITU-T V.56ter Test procedure for evaluation of 2-wire 4 kHz voiceband duplex modems
ITU-T R.21 9600 bit/s modem standardized for use in the telegraph TDM system
ITU-T R.22 Data over voice 19200 bit/s modem standardized for use on telephone network subscriber lines
ITU-T V.76 Generic multiplexer using V.42 LAPM-based procedures
ITU-T V.80 In-band DCE control and synchronous data modes for asynchronous DTE
ITU-T T.0 Classification of facsimile terminals for document transmission over the public networks
ITU-T D.155 Guiding principles governing the apportionment of accounting rates in intercontinental telephone relations
ITU-T T.90 AMD 2 T.90 (1992) Amendment 2
ITU-T D.91 Transmission in encoded form of maritime telecommunications accounting information
ITU-T F.162 Service and operational requirements of store-and-forward facsimile service
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