Q3 interface exchange at the Local Exchange (LE) for line and circuit testing of analogue and Integrated Services Digital Network (ISDN) suscriber lines - Part 1: Q3 interface specification
Edition 2002-04-01

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN) - DECT/ISDN interworking for intermediate system configuration; Interworking and profile specification (Endorsement of the English version EN 300822 V 1.2.1 (2001-08) as German Standard)
Edition 2002-11

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN) - Attachment requirements for terminal equipment for DECT/ISDN interworking profile applications (Endorsement of the English version EN 301440 V 1.2.2 (1999-01) as German Standard)
Edition 1999-12

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN); DECT/ISDN interworking for intermediate system configuration - Part 1: Profile Test Specification (PTS) summary (Endorsement of the English version EN 301614-1 V 1.1.2 (1999-02) as German standard)
Edition 2000-07

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 4: Gateways basic operation; Sub-part 4-2: Integrated Services Digital Network (ISDN) gateway (Endorsement of the English version ETS 300392-4-2:2000-09 as German Standard)
Edition 2001-07

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration - Part 1: Interworking specification (Endorsement of the English version EN 300434-1 V 1.2.1 (2001-10) as German Standard)
Edition 2002-11

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration - Part 2: Access profile (Endorsement of the English version EN 300434-2 V 1.2.1 (2001-08) as German Standard)
Edition 2002-11

Digital cellular telecommunications system (Phase 2) - General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) (Endorsement of the English version ETS 300604:1999 as German standard)
Edition 2000-12

Multimedia Terminals and Applications (MTA) - Programmable Communication Interface (PCI) for file transfer over Integrated Services Digital Network (ISDN) (Endorsement of the English version ETS 300835:1998 as German)
Edition 2001-04

Digital cellular telecommunications system (Phase 2+) - General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) (Endorsement of the English version ETS 300976:2000-06 as German standard)
Edition 2001-06