[EMAIL PROTECTED] wrote: > Hi, > > Should a to-tag be added to a 487 response to an initial INVITE? Even if 180 > Ringing has not been sent? > > Regards, > > Sunil > Yes. RFC 3261 Section 8.2.6.2:
additionally, 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) Regards, Michael PS Looking in the footer for this list shows: > Sip mailing list https://www.ietf.org/mailman/listinfo/sip > This list is for NEW development of the core SIP Protocol > Use [EMAIL PROTECTED] for questions on current sip > Use [EMAIL PROTECTED] for new developments on the application of sip Maybe you should consider sip-implementors for further questions like this. _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
