Integrated Services Digital Network (ISDN) - Closed User Group (CUG) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300138-1 V 1.3.4 (1998-06) as German standard)
Edition 2000-01

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Supplementary service interactions - Part 1: Protocol specification (Endorsement of the English version EN 300195-1 V 3.1.1 (2002-04) as German Standard)
Edition 2002-12

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol - Data link layer - Part 7: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the general protocol (Endorsement of the English version EN 300402-7 V 1.4.5 (2000-08) as German standard)
Edition 2001-02

Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 2: Single talker and multiple listeners, high-speed transmission (IEC 61162-2:1998); German version EN 61162-2:1998
Edition 1999-10

Methods of measurement for equipment used in digital microwave transmission systems - Part 3: Measurements on satellite earth stations; section 6: High-power amplifiers (IEC 60835-3-6:1996); German version EN 60835-3-6:1996
Edition 1997-03

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2); B-ISDN user-network interface layer 3 specification for basic call/bearer control - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300443-3 V 1.2.1 (2001-06) as German Standard)
Edition 2002-11

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurement on satellite earth stations; section 13: VSAT systems (IEC 60835-3-13:1996); German version EN 60835-3-13:1996
Edition 1997-05

Integrated Services Digital Network (ISDN) - Conference call, add-on (CONF) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300185-2 V 1.2.4 (1998-06) as German standard)
Edition 2000-01

Integrated Services Digital Network (ISDN) - Conference call, add-on (CONF) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300185-3 V 1.2.4 (1998-06) as German standard)
Edition 2000-01

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurements on satellite earth stations; section 4: Low noise amplifier (IEC 60835-3-4:1993); German version EN 60835-3-4:1995
Edition 1995-06