Integrated Services Digital Network (ISDN); syntax-based videotex end-to-end protocols; circuit mode DTE-DTE; english version ETS 300079:1991
Edition 1992-09

Integrated Services Digital Network (ISDN); support of packet-mode terminal equipment by an ISDN; english version ETS 300007:1991
Edition 1992-11

Integrated Services Digital Network (ISDN); CCITT signalling system no. 7; Transaction Capabilities Application Part (TCAP); English version ETS 300134:1992
Edition 1993-07

Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service; functional capabilities and information flows; english version ETS 300051:1991
Edition 1992-09

Terminal equipment (TE); syntax-based videotex common end-to-end protocols; English version ETS 300223:1993
Edition 1994-01

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