[Serusers] re-INVITE and bye

[Marian Dumitru]

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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