no, it's not mandatory. from rfc3261 section "8.2.6.2 Headers and Tags"
the UAS MUST add a tag to the To header field in the response (with the exception of the 100 (Trying) response, in which a tag MAY be present). -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sudhir Sharma Sent: 29 February 2008 07:15 To: [email protected] Subject: [Sip-implementors] 100 Trying sent by proxy. Hi, Can somebody please let me know if it is mandatory to add TO tag in 100 trying message sent(initiated) by Proxy to UAC (assuming UAS does not respond with 100 trying) . Thanks in Advance ________________________________________________________________________ ____________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
