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

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

Electricity metering - Data exchange for meter reading, tariff and load control - Part 42: Physical layer services and procedures for connection-oriented asynchronous data exchange (IEC 62056-42:2002); German version EN 62056-42:2002, text in English
Edition 2003-01

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

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

European digital cellular telecommunications system (Phase 2) - Mobile Station - Base Station System (MS-BSS) interface - Data Link (DL) layer specification; English version ETS 300555:1994
Edition 1995-01

Electricity metering - Data exchange for meter reading, tariff and load control - Part 21: Direct local data exchange (IEC 62056-21:2002); German version EN 62056-21:2002, text in English
Edition 2003-01

Electricity metering - Data exchange for meter reading, tariff and load control - Part 46: Data link layer using HDLC-protocol (IEC 62056-46:2002 + A1:2006); German version EN 62056-46:2002 + A1:2007, text in English
Edition 2007-08

Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition (IEC 65C/1099/CDV:2021); English version prEN IEC 61158-2:2021
Edition 2022-11