Hi Kaiser,

First of all if it's about an existent call, the UA must send only BYE, not CANCEL (at t1). Anyhow if a re-INVITE is received after BYE was sent, it must be rejected by the UA. Re-INVITEs are requests within dialog, and via BYE the UA close the dialog, so the re-INVITE will not match any dialog. So definitely it will not be a new call.

Best regards, Marian

kaiser wrote:

Hi,

I have a question that if a proxy send a re-invite to a UA, and almost at that moment, UA hangup. If network is slow, the packet delay could cause a funny situation. That UA ring after hangup... For example

t0(0 sec):proxy send reinvite to UA to a existed call t1(0.1 sec):UA send BYE or Cancel to proxy, because user hangup, t2(0.2 sec):UA receive the reivite from proxy.

at this senario, UA receives an re-invite "INVITE" , would this reinvite cause the IP-phone ring when "hangup"? Of course, this is not always happen, but it could be happen, right? The Cseq is different, UA would treat the re-invite as a new call. Is it right?

best regard kaiser

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