Integrated Services Digital Network (ISDN) - Call Deflection (CD) supplementary service - Service description; English version 300202:1995/A1:1996
Edition 1997-10

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

Integrated Services Digital Network (ISDN); syntax-based videotex lower layers protocols for ISDN packet mode (CCITT Recommendation X.31 case A and case B); English version ETS 300218:1993
Edition 1994-01

Integrated Services Digital Network (ISDN) - User-to-User Signalling (UUS) supplementary service - Service description; English version ETS 300284:1996
Edition 1996-10

Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Message Transfer Part (MTP) protocol Tester (MT); English version ETS 300346:1997
Edition 1998-07

Transmission and Multiplexing (TM) - Flexible Multiplexer Equipment - Management and control functions; English version ETS 300461-2:1996
Edition 1997-07

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

European digital cellular telecommunications system (phase 2) - Technical realization of facsimile group 3, transparent; English version ETS 300538:1995
Edition 1996-04

European digital cellular telecommunications system (Phase 2) - Mobile Station - Base Station System (MS-BSS) interface - General aspects and principles; English version ETS 300550:1994
Edition 1995-01

Digital cellular telecommunications system (Phase 2) - Subscriber, Mobile Equipment (ME) and services data administration; English version ETS 300613:1996
Edition 1997-07