From: Nitzan <[EMAIL PROTECTED]> i was able to capture such a SIP call live and i have seen the following, an INVITE is being sent from the UA, the Proxy is sending 100 message as it should and maybe a half a second later another INVITE is being sent from the UA ! with the same info as the 1st INVITE, this repeats it self and every time my Proxy says "Trying 100" but only one of these INVITEs will proceed and connect.
If the INVITEs have the same CSeq value, all other components in the system should treat them as duplicates, and you should not get multiple charging. (Note that an IP network may deliver multiple copies of a UDP packet, so it may not be the UA that is at fault.) If the callee has already sent a response to the INVITE, every time it receives an additional copy of the INVITE, it should send a duplicate of the response. (Until a particular one of the timers has expired.) Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
