Integrated Services Digital Network (ISDN); user-network interface data link layer specification; application of CCITT recommendations Q.920/I.440 and Q.921/I.441; english version ETS 300125:1991
Edition 1992-05

Integrated Services Digital Network (ISDN) - Access digital section for ISDN primary rate; English version ETS 300233:1994
Edition 1994-10

Integrated Services Digital Network (ISDN); telephony 3,1 kHz teleservice; service description; english version ETS 300111:1992
Edition 1993-04

Frame relay services - Part 2: Integrated Services Digital Network (ISDN); frame relay bearer service; service definition; English version ETS 300399-2:1995
Edition 1995-10

Integrated Services Digital Network (ISDN); service requirements for telefax group 4; English version ETS 300120:1992
Edition 1993-06

European digital cellular telecommunications system (Phase 2) - Base Station Controller - Base Transceiver Station (BSC-BTS) interface - Layer 2 specification; English version ETS 300595:1994
Edition 1995-02

Integrated Services Digital Network (ISDN); circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category; service description; english version ETS 300108:1992
Edition 1993-04

Integrated Services Digital Network (ISDN); circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for speech information transfer; service description; english version ETS 300109:1992
Edition 1993-04

Integrated Services Digital Network (ISDN); circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for 3,1 kHz audio information transfer; service description; english version ETS 300110:1992
Edition 1993-04

Integrated Services Digital Network (ISDN) - Telephony 7 kHz teleservice - Service description; English version ETS 300263:1994
Edition 1994-11