Dave Saville wrote:[color=blue]
> I have a Siemens S450IP and it normally dials out on one of my VOIP
> connections (Voiptalk.org). If my wife calls our doctor's, which has
> some fancy pbx, after a few seconds of talking to the receptionist it
> drops out to an engaged tone. This is very repeatable, and is somewhat
> anoying. Today she was getting *really* cross so I said to force it
> out over BT. She did this and of course it was perfect. Now I realise
> that this is a typical example of one, to assume that BT will always
> work, but has anyone any ideas what might be going on? It drops out in
> the middle of sentences so can't be any silence detection thing.
>[/color]

There are 2 ways to diagnose this problem

1) run wireshark locally and see whether the phone is sending a hangup
(BYE) message or not.

2) Ask Voiptalk to look in their logs and see what is going on.


You could also try a call with another SIP provider to see if that makes
any difference (although interesting, this doesn't rule out a phone problem)

Tim