2.2.13 Reason Header Field Extension

  • Article

This protocol defines a Reason header field parameter. The ABNF, as defined in [RFC5234], from [RFC3326] section 2 is extended as follows:

Reason            =  "Reason" HCOLON reason-value *(COMMA reason-value)
reason-value      =  protocol *(SEMI reason-params)
protocol          =  "SIP" / "Q.850" / token
reason-params     =  protocol-cause / reason-text
                      / ms-acceptedby-param
                      / reason-extension
ms-acceptedby-param = "ms-acceptedby=" SIPURI

SIPURI is defined in [RFC3261] section 25.