Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service - Service description; English version ETS 300208:1996
Edition 1996-10

Integrated Services Digital Network (ISDN) - Public Switched Telephone Network (PSTN) - Premium Rate (PRM) service; service description; English version ETS 300712:1997
Edition 1997-12

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

Network Aspects (NA) - Universal Personal Telecommunication (UPT); Phase 1 - Service description; English version ETS 300779:1997
Edition 1998-07

Broadband Integrated Services Digital Network (B-ISDN) - Signalling System No. 7 - B-ISDN User Part (B-ISUP) Capability Set 1 (CS1); Basic services (ITU-T Q.2761 to Q.2764:1995, modified); English version ETS 300656:1997
Edition 1998-02

European digital cellular telecommunications system (Phase 2) - Call Barring (CB) supplementary services - Stage 2; English version ETS 300548:1995
Edition 1995-09

Private Integrated Services Network (PISN) - Cordless Terminal Mobility (CTM) - Call handling additional network features; service description; English version ETS 300694:1996
Edition 1996-12

European digital cellular telecommunications system (Phase 2) - Description of Charge Advice Information (CAI); English version ETS 300510:1996
Edition 1996-10

Integrated Services Digital Network (ISDN); Call Waiting (CW) supplementary service; service description; english version ETS 300056:1991
Edition 1992-09

European digital cellular telecommunications system (Phase 2) - Principles of telecommunication services supported by a GSM Public Land Mobile Network (PLMN); English version ETS 300500:1996
Edition 1996-08