Dear all,
I have a question about the SIP reason header syntax. Apologies if this has
been asked before or in case this isn't the right forum.
In RFC 3326 the Reason header is defined 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
/ reason-extension
protocol-cause = "cause" EQUAL cause
cause = 1*DIGIT
reason-text = "text" EQUAL quoted-string
reason-extension = generic-param
----------------------------------
The question is whether the following syntax is correct given the fact that
there is a sentence " SIP: The cause parameter contains a SIP status code.":
Reason: SIP ;text="Network Initiated Resume"
Or does the sentence means that a reason-param "protocol-cause" is actually
mandatory ?
Many thanks
Jan Van Geel
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