Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call intrusion supplementary service (ISO/IEC 14846 (2003), modified) (Endorsement of the English version EN 300426 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Broadband Integrated Services Digital Network (B-ISDN) - Signalling ATM Adaptation Layer (SAAL); Service Specific Connection Oriented Protocol (SSCOP) - Part 1: Protocol specification (ITU-T-Recommendation Q.2110, modified); (Endorsement of the English version EN 300436-1 V 1.2.1 (2000-09) as German Standard)
Edition 2001-09

Broadband Integrated Services Digital Network (B-ISDN) - Signalling ATM Adaptation Layer (SAAL) - Layer management for the SAAL at the Network Node Interface (NNI) - Part 1: Service Specific Connection Oriented Protocol (SSCOP) and Service Specific Co-ordination Function (SSCF) (ITU-T Recommendation Q.2144 (1995), modified) (Endorsement of the English version EN 300647-1 V1.1.2 (1998-11) as German standard)
Edition 2000-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Circuit mode basic services, Network Layer (NL) - Part 1: Test Suite Structure and Test Purposes (TSS&TP) (Endorsement of the English version EN 300805-1 V 1.2.1 (2000-05) as German standard)
Edition 2001-06

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Circuit mode basic services, Network Layer (NL) - Part 2: Abstract Test Suite (ATS) (Endorsement of the English version EN 300805-2 V 1.2.1 (2000-05) as German standard)
Edition 2001-06

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Transit counter additional network feature [ISO/IEC 15055 (1997) modified]; English version EN 301048 V 1.1.1 (1997.09)
Edition 1998-10

Private Integrated Services Network (PISN) - Mapping functions for the employment of a circuit mode basic service and the supplementary service user-to-user signalling as a pair of on-demand inter-PINX connections (Mapping/UUS) (Endorsement of the English version EN 301102 V 1.1.1 (1998-06) as German standard)
Edition 2000-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Message waiting indication supplementary service (ISO/IEC 15506 (2003), modified) (Endorsement of the English version EN 301255 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Recall supplementary service (ISO/IEC 15052 (2003), modified) (Endorsement of the English version EN 301258 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private Integrated Network eXchange (PINX) clock synchronization (ISO/IEC 15507 (1997), modified) (Endorsement of the English version EN 301259 V 1.1.1 (1998-10) as German standard)
Edition 2000-03