Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 2: Specification and Description language (SDL) diagrams (Endorsement of the English version EN 300403-2 V 1.3.1 (2000-11) as German standard)
Edition 2001-05

Information Processing Systems-Open Systems Interconnection-Internal Organization of the Network Layer
Edition 1988-07-01

Private Integrated Services Network (PISN) - Service description, functional capabilities and information flows - Circuit-mode 64 kbit/s bearer services [ISO/IEC 11574 (2000) modified] (Endorsement of the English version EN 300171 V1.3.1 (2003-06) as German standard)
Edition 2004-03

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 7: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsement of the English version EN 300403-7 V 2.1.2 (2000-02) as German standard)
Edition 2000-12

Information technology - Telecommunications and information exchange between systems - Use of X.25 to provide the OSI Connection-mode Network Service
Edition 1995-02-28

Open Systems Interconnection - Address information exchange protocol for use in conjunction with DIN ISO/IEC 8878 on a subnetwork; identical with ISO/IEC 10030:1995
Edition 1996-07

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

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

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

Distribution automation using distribution line carrier systems - Part 4-512: Data communication protocols; System management using profile IEC 61334-5-1; Management Information Base (MIB) (IEC 61334-4-512:2001); German version EN 61334-4-512:2002, text in english
Edition 2002-11