Internet Assigned Numbers Authority 'version' symbols used within the ISUP and QSIG Created 2001-09-06 Last Updated 2023-02-21 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below * application/ISUP symbols * application/QSIG symbols application/ISUP symbols Registration Procedure(s) Expert Review Expert(s) Jon Peterson Reference [RFC3204] Available Formats [IMG] CSV Symbol Reference itu-t88 [ITU-T Q.761-4 (1988)] itu-t92+ [ITU-T Q.761-4 (1992)] ansi88 [ANSI T1.113-1988 ("Signaling System Number 7 (SS7) - ISDN User Part")] ansi00 [ANSI T1.113-2000] etsi121 [ETS 300 121 ("Integrated Services Digital Network (ISDN)" Application of the ISDN User Part (ISUP) of CCITT Signalling System No. 7 for international ISDN interconnections (ISUP version 1).)] etsi356 [ETS 300 356-1 ("Integrated Services Digital Network (ISDN)"; Signalling System No.7; ISDN User Part (ISUP) version 2 for the international interface.)] ttc87 [JT-Q761-4(1987-1992)] ttc93+ [JT-Q761-4(1993-)] application/QSIG symbols Registration Procedure(s) Expert Review Expert(s) Jon Peterson Reference [RFC3204] Available Formats [IMG] CSV Symbol Reference [ISO/IEC 11572 (Basic Call) (Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit mode bearer services -- Inter-exchange signalling procedures and protocol.)][ISO/IEC 11582 (Generic iso Functional Protocol) (Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Generic functional protocol for the support of supplementary services -- Inter-exchange signalling procedures and protocol.)] Licensing Terms