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ITU-T Q.1100 Structure of the Recommendations on the INMARSAT mobile satellite systems
ITU-T Q.1204 Intelligent network distributed functional plane architecture
ITU-T V.14 Transmission of start-stop characters over synchronous bearer channels
ITU-T V.28 Electrical characteristics for unbalanced double-current interchange circuits
ITU-T V.32 A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits
ITU-T Z.351 Data oriented human-machine interface specification technique - Introduction
ITU-T D.178 Monthly accounts for semi-automatic telephone calls (ordinary and urgent calls, with or without special facilities)
ITU-T E.452 Facsimile modem speed reductions and transaction time
ITU-T E.600 Terms and definitions of traffic engineering
ITU-T E.770 Land mobile and fixed network interconnection traffic grade of service concept
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