Integrated Services Digital Network (ISDN); Terminal Portability (TP) supplementary service; functional capabilities and information flows; english version ETS 300054:1991
Edition 1992-09

Private Telecommunication Network (PTN); signalling at the S-reference point; generic feature key management protocol for the control of supplementary services; English version ETS 300240:1993
Edition 1993-12

Private Telecommunication Network (PTN); signalling at the S-reference point; generic keypad protocol for the support of supplementary services; English version ETS 300190:1992
Edition 1993-09

Public Switched Telephone Network (PSTN) - Category II specification for 2400 bits per second duplex modems standardized for use on the PSTN; English version ETS 300117:1996
Edition 1997-08

Integrated Services Digital Network (ISDN) - ISDN Packet Mode Bearer Services (PMBS) - ISDN Virtual Call (VC) and Permanent Virtual Call (PVC) bearer services provided by the B-channel of the user access, basic and primary rate; English version ETS 300048:1997
Edition 1998-08

European digital cellular telecommunications system (Phase 2) - Discontinuous Reception (DRX) in the GSM system; English version ETS 300531:1994
Edition 1995-01

Transmission and Multiplexing (TM) - Synchronous Digital Hierarchy (SDH) Network protection schemes - Automatic Protection Switch; APS protocols and operation; English version ETS 300746:1997
Edition 1997-12

Distribution automation using distribution line carrier systems - Part 4-61: Data communication protocols; network layer; connectionless protocol (IEC 61334-4-61:1998); German version EN 61334-4-61:1998, Text in English
Edition 1999-08

Health informatics - Electronic health record communication - Part 5: Interface specification (ISO 13606-5:2019); English version EN ISO 13606-5:2019
Edition 2019-11

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