Hi all,
we are currently discussing if it is possible (and - esp. - allowed) to
set both, a "Require:"- and a "Supported:"-Header with the
"100rel"-option in the same INVITE-Request. In my opinion, if 100rel is
set in the "Require:"-header, it is implicitely also supported and
should not explicitely set in the "Supported:"-header.
Is this assumption correct? How should a UAS react, if this option is
set twice (*Supported:* and *Required*)?
Thx in advance and BR
Michael
RFC3262, 8.1: 100rel
Description: This option tag is for reliability of provisional
responses. When present in a *Supported* header, it indicates
that the UA can *send* *or* *receive* reliable provisional
responses.
When present in a *Require* header in a request, it indicates
that the *UAS* *MUST* *send* all provisional responses
reliably.
When present in a Require header in a reliable provisional
response, it indicates that the response is to be sent
reliably.
Read more: http://www.faqs.org/rfcs/rfc3262.html#ixzz0n9ZAm3Xu
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