Hi Jo,
> > I have a question regarding the termination of pending INVITEs
> > without the possibility of the call being set up.
> > Consider sending an INVITE which gets a 200 OK response.
> > The UA decides, fow whatever reason, to drop the call. To do
> > this, the UA sends a BYE. The INVITE, however, needs to be
> > ACKed as well. Now if the BYE and ACK follow different routes,
> > then there is the possibility that the ACK arrives first and
> > the call gets set up before the BYE terminates it.
>
> I'm not entirely sure why the ACK and BYE would follow different
> routes; however, this is a somewhat moot point, since they could
> arrive out of order due to packet lossage.
[Will] The main point I was trying to get was that if the BYE
arrives after the ACK at the server, then the call will get
set up briefly before being torn down. The user would possibly
be billed for a call that they wanted to reject. Is this a viable
scenario?
Regards,
Will
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