> > Does the request include *any* Allow header field? > > No request do not have any Allow header.
Since you only mentioned "request", you might want to check all of the requests and responses from the UA associated with the dialog. However as Paul mentioned, RFC 3261 section 20.5 may be applicable. "The absence of an Allow header field MUST NOT be interpreted to mean that the UA sending the message supports no methods. Rather, it implies that the UA is not providing any information on what methods it supports." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors