Integrated Services Digital Network (ISDN) - Specification of the Packet Handler access point Interface (PHI) (Endorsement of the English version ETS 300099:1998 as German standard)
Edition 2000-06

Integrated Services Digital Network (ISDN); routing in support of ISUP version 1 services; english version ETS 300100:1992
Edition 1992-09

Integrated Services Digital Network (ISDN); user-network interface layer 3; specification for basic call control; english version ETS 300102-1:1990
Edition 1992-02

Integrated Services Digital Network (ISDN); user-network interface layer 3; specifications for basic call control; English version ETS 300102-1:1990/A2:1993
Edition 1994-04

Integrated Services Digital Network (ISDN); user-network interface layer 3; specifications for basic call control; Specification Description Language (SDL) diagrams; english version ETS 300102-2:1990
Edition 1992-02

Integrated Services Digital Network (ISDN); support of CCITT recommendation X.21, X.21bis and X.20bis based Data Terminal Equipments (DTEs) by an ISDN; synchronous and asynchronous terminal adaption functions; english version ETS 300103:1990
Edition 1992-02

Integrated Services Digital Network (ISDN); attachment requirements for terminal equipment to connect to an ISDN using ISDN basic access; layer 3 aspects; english version ETS 300104:1991
Edition 1992-05

Integrated Services Digital Network (ISDN) - Attachment requirements for terminal equipment to connect to an ISDN using ISDN basic access - Layer 3 aspects; English version ETS 300104:1991/A1:1994
Edition 1994-11

Terminal Equipment (TE); international videotex interworking; english version ETS 300105:1991
Edition 1992-11

Terminal Equipment (TE); international videotex interworking between a terminal and a host; english version ETS 300106:1991
Edition 1993-04