Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service - Service description; English version ETS 300208:1996
Edition 1996-10

Maritime navigation and radiocommunication equipment and systems - Integrated Bridge Systems (IBS) - Operational and performance requirements, methods of testing and required test results (IEC 61209:1999); German version EN 61209:1999
Edition 2000-04

Network Aspects (NA) - Metropolitan Area Network (MAN) - Protocol Implementation Conformance Statement (PICS); English version ETS 300268:1994
Edition 1994-10

Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) supplementary service - Functional capabilities and information flows; English version ETS 300358:1995
Edition 1996-04

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

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Generic functional protocol for the support of supplementary services - Part 2: Abstract Test Suite (ATS) specification; English version ETS 300806-2:1998
Edition 1998-12

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) - Digital Subscriber Signalling System No. one (DSS1) protocol - Data link layer - Part 2: General protocol specification [ITU-T Q.921 (1993), modified]; English version ETS 300402-2:1995
Edition 1996-06

Integrated Services Digital Network (ISDN) - Access digital section for ISDN basic rate; English version ETS 300297:1995/A1:1996
Edition 1996-10

Data communication - Use of the X.25 packet level protocol in local and metropolitan area networks; identical with ISO/IEC 8881:1989 (status of 1991)
Edition 1996-01