Open systems interconnection - Protocol for providing the connectionless-mode network service - Part 4: Provision of the underlying service by a subnetwork that provides the OSI data link service; identical with ISO/IEC 8473-4:1995
Edition 1996-06

Integrated Services Digital Network (ISDN) - Synchronization and Co-ordination Function (SCF) for the provision of the OSI Connection-mode Network Service (OSI CONS) in an ISDN environment - Specification of SCF (ITU-T Recommendation Q.923 (1995), modified); English version ETS 300660:1996
Edition 1997-04

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

Open Systems Interconnection - Protocol for providing the connectionless-mode network service - Part 2: Provision of the underlying service by a DIN ISO/IEC 8802-2 subnetwork (ISO/IEC 8473-2:1996)
Edition 1997-06

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Data link layer - Part 1: General aspects [ITU-T Q.920 (1993), modified]; English version ETS 300402-1:1995
Edition 1996-06

Open Systems Interconnection - Protocol for providing the connectionless-mode network service - Part 3: Provision of the underlying service by an X.25 subnetwork; identical with ISO/IEC 8473-3:1995
Edition 1996-06

Frame relay services - Part 3: Frame relay data transmission service; service definition; English version ETS 300399-3:1995
Edition 1995-10

Broadband Integrated Services Digital Network (B-ISDN) - Asynchronous Transfer Mode (ATM) - Adaptation Layer (AAL) specifications; type 5; English version ETS 300428:1995
Edition 1996-04

Industrial communication networks - Fieldbus specifications - Part 3-20: Data-link layer service definition - Type 20 elements (IEC 61158-3-20:2014); English version EN 61158-3-20:2014, only on CD-ROM
Edition 2015-07

Frame relay services - Part 1: General description; English version ETS 300399-1:1995
Edition 1995-11