hanifa.mohammed wrote:
Hi,1. Only one INVITE request may be pending within a dialog. Else, 491 will be sent. 2. Only one non-INVITE request may be pending within a dialog (in one direction): it is not possible to send UPDATE if no final response has been received to PRACK.Pl clarify whether the above points are right. Esp, the second point.
It is possible to have more than one non-invite transaction in progress, but it is usually unwise.
If they get out of order, so the 2nd arrives before the first, then the first will be rejected with a 500 response. There are a few cases where this is acceptable. But in most cases you would be well advised to restrict to one transaction at a time.
Paul _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors at cs.columbia.edu for questions on current sip Use sipping at ietf.org for new developments on the application of sip