Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Circuit mode basic services, Data Link Layer (DLL) - Part 2: Abstract Test Suite (ATS) specification; English version ETS 300804-2:1998
Edition 1998-12

Industrial communication Networks - Fieldbus specifications - Part 4-2: Data-link layer protocol specification - Type 2 elements (IEC 61158-4-2:2019); English version EN IEC 61158-4-2:2019, only on CD-ROM
Edition 2020-08

Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements (IEC 61158-4-24:2019); English version EN IEC 61158-4-24:2019, only on CD-ROM
Edition 2020-08

Electronic railway equipment - Train communication network (TCN) - Part 3-4: Ethernet Consist Network (ECN) (IEC 61375-3-4:2014); English version EN 61375-3-4:2014
Edition 2015-10

European digital cellular telecommunications system (Phase 2) - Data Link (DL) layer - General aspects; English version ETS 300554:1994
Edition 1995-01

European digital cellular telecommunications system (Phase 2) - Layer 1 - General requirements; English version ETS 300553:1994
Edition 1995-01

Information processing systems; fibre distributed date interface (FDDI); part 2: token ring media access control (MAC) (ISO 9314-2:1989); English version EN 29314-2:1993
Edition 1993-12

Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements (IEC 61158-4-21:2019); English version EN IEC 61158-4-21:2019, only on CD-ROM
Edition 2020-08

Integrated Services Digital Network (ISDN); user-network interface data link layer specification; application of CCITT recommendations Q.920/I.440 and Q.921/I.441; english version ETS 300125:1991
Edition 1992-05

Transmission and multiplexing (TM); protocol suites for Q interfaces for management of transmission systems; English version ETS 300150:1992
Edition 1994-01