Parameter: ISUP Protocol Variant

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  • ANSI88: Used for ANSI88 specification
  • ANSI92: Used for ANSI92 specification
  • ANSI95: Used for ANSI95 specification
  • TELCORDIA: Used for BELLCORE specification
  • ITU: Used for ITU, ITU88 and ITU92 specification
  • ITU97: Used for ITU97 specification
  • SINGAPORE: Used for SINGAPORE specification
  • Q767: Used for Q767 specification
  • NTT: Used for NTT specification
  • CHINA: Used for CHINA specification
  • ETSI: Used for ETSI specification
  • ETSIV3: Used for ETSI V3 specification
  • UK: Used for UK specification
  • SPIROU: Used for Spirou specification
  • RUSSIA: Used for Russia specification


The SIP header Content-type base value:

Content-Type:application/ISUP;base=itu-t92+;version=itu-t

is set according to the following table:

ISUP Protocol Variant Content-Type base value
ANSI88, ANSI92, ANSI95 ansi00
TELECORDIA gr317
ETSI etsi121
ETSIV3 etsi356
ITU, ITU97, SINGAPORE, Q767, NTT, CHINA, UK, SPIROU, RUSSIA itu-t92+
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