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ITU-T I.255.4 Community of interest supplementary services : Priority service
ITU-T I.253.1 Call completion supplementary services : Call waiting (CW) supplementary service
ITU-T J.61 Transmission performance of television circuits designed for use in international connections
ITU-T J.63 Insertion of test signals in the field-blanking interval of monochrome and colour television signals
ITU-R M.540-2 Operational and technical characteristics for an automated direct-printing telegraph system for promulgation of navigational and meteorological warnings and urgent information to ships
ITU-R M.688-0 Technical characteristics for a high frequency direct-printing telegraph system for promulgation of high seas and NAVTEX-type maritime safety information
ITU-R F.348-4 Arrangement of channels in multi-channel single-sideband and independent-sideband transmitters for long-range circuits operating at frequencies below about 30 MHz
ITU-T J.101 Measurement methods and test procedures for teletext signals
ITU-R F.695-0 Availability objectives for real digital radio-relay links forming part of a high-grade circuit within an integrated services digital network
ITU-T J.85 Digital television transmission over long distances - General principles
ITU-T J.100 Tolerances for transmission time differences between the vision and sound components of a television signal