[Freeswitch-users] How to tell if 100 Trying received

Anthony Minessale anthony.minessale at gmail.com
Tue Apr 21 08:03:43 PDT 2009

That 100 trying is handled deep in the sip stack.
The author of sofia said it would be a big job to bring that up to the even
Someone may be able to persuade him to allow you to pass a global timeout
waiting for 100
or something but no solution exists atm

On Tue, Apr 21, 2009 at 3:32 AM, John Dalgliesh <johnd at defyne.org> wrote:

> Hi,
> I am trying to use FS to make outgoing SIP calls. I have a number of
> gateways that can make the call. However, if one of them is down or has
> some other problem then I would like to detect that quickly.
> I intended to use the provisional '100 Trying' message for this... if it
> hasn't been received in a couple of seconds then go on and try the next
> gateway.
> But I can't find a flag/event/state which corresponds to receipt of this
> message. Can anyone tell me where I should be looking? I put a debug print
> in sofia_event_callback for every event but there doesn't seem to be one
> fired for this condition.
> Thanks in advance.
> {P^/
> John
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Anthony Minessale II

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