Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Single step call transfer supplementary service (ISO/IEC 19460 (2003), modified) (Endorsement of the English version EN 301919 V1.1.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Simple dialog supplementary service [ISO/IEC 21407 (2001) modified] (Endorsement of the English version EN 301920 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Simple dialog supplementary service (ISO/IEC 21408 (2003), modified) (Endorsement of the English version EN 301921 V1.1.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Call identification and call linkage additional network features [ISO/IEC 21888 (2001) modified] (Endorsement of the English version EN 301922 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call identification and call linkage Additional Network Feature (ANF) (ISO/IEC 21889 (2001), modified) (Endorsement of the English version EN 301923 V1.1.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Mapping functions for the employment of 64 kbit/s circuit mode connections with 8 kbit/s sub-multiplexing (ISO/IEC 17311 (2002), modified) (Endorsement of the English version EN 301924 V 1.1.1 (2002-09) as German standard)
Edition 2003-07

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Short message service supplementary service [ISO/IEC 21989 (2002) modified] (Endorsement of the English version EN 301990 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Short message service [ISO/IEC 21990 (2002) modified] (Endorsement of the English version EN 301991 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Mapping functions for the tunnelling of QSIG through H.323 networks (Endorsement of ISO/IEC 23290 (2002), modified) (Endorsement of the English version EN 302037 V 1.1.1 (2003-05) as German standard)
Edition 2003-12

Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) - Digital Subscriber Signalling System No. two (DSS2); Broadband Inter-Exchange Signalling (B-QSIG) and Signalling System No. 7 (SS7); Prenegotiation - Part 1: Protocol specification (Endorsement of the English version EN 302091-1 V 1.1.3 (1999-11) as German standard)
Edition 2000-10