Aerospace series - General recommendation for the BIT Architecture in an integrated system; German and English version EN 9721:2021
Edition 2022-09

Integrated Services Digital Network (ISDN) - Access digital section for ISDN primary rate; English version ETS 300233/A1:1995
Edition 1995-10

Integrated Services Digital Network (ISDN) - Primary rate User-Network Interface (UNI) - Part 2: Conformance test specification for interface IA and IB; English version ETS 300011-2:1998
Edition 1998-12

Integrated Services Digital Network (ISDN) - Signalling interworking specification for ISDN User Part (ISUP) version 1; English version ETS 300343:1994
Edition 1995-01

Integrated Services Digital Network (ISDN) - Primary rate User-Network Interface (UNI) - Part 3: Implementation Conformance Statement (ICS) and Implementation eXtra Information for Testing (IXIT) proforma specification for interface IA and IB; English version ETS 300011-3:1998
Edition 1998-12

Transmission and Multiplexing (TM) - Synchronous cross connection equipment 64 and n × 64 kbit/s cross connection rate 2048 kbit/s access ports - Part 2: Management aspects; English version ETS 300010-2:1997
Edition 1997-12

Transmission and Multiplexing (TM) - Flexible Multiplexer Equipment - Management and control functions; English version ETS 300461-2:1996
Edition 1997-07

Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Signalling interworking specification for ISDN User Part (ISUP) version 2; English version ETS 300360:1995
Edition 1995-11

Communication systems for meters - Part 7: Transport and security services; German version EN 13757-7:2018
Edition 2018-06

Integrated Services Digital Network (ISDN) - Audiovisual services - Frame structure for a 64 kbit/s to 1920 kbit/s channel and associated syntax for inband signalling; English version ETS 300144:1996
Edition 1996-08