Integrated Services Digital Network (ISDN); conference call, add-on (CONF) supplementary service; service description; English version ETS 300183:1992
Edition 1993-09

Private Telecommunication Network (PTN); signalling protocol at the S-reference point; circuit mode basic services; English version ETS 300192:1992
Edition 1993-09

Business TeleCommunications (BTC) - Planning of loudness rating and echo values for private networks digitally connected to the public network; English version ETS 300283:1994
Edition 1994-09

European digital cellular telecommunications system (Phase 2) - Closed User Group (CUG) supplementary services - Stage 2; English version ETS 300546:1996
Edition 1996-08

Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; functional capabilities and information flows; english version ETS 300137:1992
Edition 1992-12

European digital cellular telecommunications system (Phase 2) - Location registration procedures; English version ETS 300530:1994
Edition 1995-01

Universal Personal Telecommunication (UPT) - Security architecture for UPT phase 2 - Conformance Test Specification; English version ETS 300791:1997
Edition 1998-07

European digital cellular telecommunications system (Phase 2) - Call Waiting (CW) and Call Hold (HOLD) supplementary services - Stage 2; English version ETS 300544:1995
Edition 1995-09

Digital Video Broadcasting (DVB) - Network-independent protocols for DVB interactive service; English version ETS 300802:1997
Edition 1998-06

Integrated Services Digital Network (ISDN) - File transfer over the ISDN EUROFILE transfer profile; English version ETS 300383:1995
Edition 1995-07