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ITU-T Q.692 Logic procedures for interworking of Signalling System No. 7 (ISUP) to No. 7 (TUP)
ITU-T Q.716 Signalling system no. 7 - Signalling connection control part (SCCP) performance
ITU-T Q.725 Signalling performance in the telephone application
ITU-T Q.755 Signalling system no. 7 - Protocol tests
ITU-T Q.1400 Architecture framework for the development of signalling and OA&M protocols using OSI concepts
ITU-T Q.1112 Procedures for interworking between INMARSAT standard-B system and the international public switched telephone network/ISDN
ITU-T R.5 Observation conditions recommended for routine distortion measurements on international telegraph circuits
ITU-T R.9 How the laws governing distribution of distortion should be arrived at
ITU-T R.54 Conventional degree of distortion tolerable for standardized start-stop 50-baud systems
ITU-T R.56 Telegraph distortion limits to be quoted in recommendations for equipment and transmission plans
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