Integrated Services Digital Network (ISDN); Terminal Portability (TP) supplementary service; functional capabilities and information flows; english version ETS 300054:1991
Edition 1992-09

Integrated Services Digital Network (ISDN); Direct Dialling In (DDI) supplementary service; service description; english version ETS 300062:1991
Edition 1992-09

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) - Facsimile group 4 class 1 on the ISDN - Functional specification of the equipment; English version ETS 300087:1994
Edition 1994-11

Private Telecommunications Network (PTN) - Method for the specification of basic and supplementary services; English version ETS 300387:1994
Edition 1994-11

European digital cellular telecommunications system (phase 2) - Line identification supplementary services, stage 3; English version ETS 300565:1995
Edition 1995-08

European digital cellular telecommunications system (Phase 2) - Advice of Charge (AoC) supplementary services - Stage 2; English version ETS 300547:1995
Edition 1995-09

Broadband Integrated Services Digital Network (B-ISDN) - Signalling system No. 7 - Interworking between Broadband ISDN User Part (B-ISUP) and narrowband ISDN User Part (ISUP) (ITU-T Q.2660:1995, modified); English version ETS 300496:1997
Edition 1998-02

Broadband Integrated Services Digital Network (B-ISDN) - Signalling System No. 7 - B-ISDN User Part (B-ISUP) Capability Set 1 (CS1) - Supplementary services (ITU-T Q.2730:1995, modified); English version ETS 300657:1997
Edition 1998-02

Human Factors (HF) - Telephone Prepayment Cards - Tactile Identifier; English version ETS 300767:1997
Edition 1998-05