Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
Edition 1992-12

Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; functional capabilities and information flows; english version ETS 300140:1992
Edition 1992-12

Integrated Services Digital Network (ISDN) and other digital telecommunications networks - Line transmission of non-telephone signals - Video codec for audiovisual services at p×64 kbits [ITU-T Recommendation H.261 (1993), modified] (Endorsement of the English version ETS 300142:1998 as German standard)
Edition 2000-06

Integrated Services Digital Network (ISDN) - Audiovisual services - Inband signalling procedures for audiovisual terminals using digital channels up to 2048 kbit/s; English version ETS 300143:1994
Edition 1994-12

Integrated Services Digital Network (ISDN) - Audiovisual services - Inband signalling procedures for audiovisual terminals using digital channels up to 2048 kbit/s; English version ETS 300143:1994/A1:1996
Edition 1996-08

Integrated Services Digital Network (ISDN) - Audiovisual services - Frame structure for a 64 kbit/s to 1920 kbit/s channel and associated syntax for inband signalling; English version ETS 300144:1996
Edition 1996-08

Integrated Services Digital Network (ISDN) - Audiovisual services - Videotelephone systems and terminal equipment operating on one or two 64 kbit/s channels; English version ETS 300145:1996
Edition 1996-08

Terminal Equipment (TE); videotex; audio syntax; english version ETS 300149:1992
Edition 1992-11

Transmission and multiplexing (TM); protocol suites for Q interfaces for management of transmission systems; English version ETS 300150:1992
Edition 1994-01

Terminal equipment (TE) - Terminal characteristics for the telematic file transfer within the teletex service (ITU-T Recommendation T.571, modified); English version ETS 300154:1994
Edition 1994-08