[Freeswitch-users] failover based on initial INVITE timeout

Brian West brian at freeswitch.org
Tue Aug 18 08:33:01 PDT 2009

I think you wanna use progress_timeout



On Aug 18, 2009, at 10:24 AM, Hristo Trendev wrote:

> I am trying to implement failover dialing plan as described in:
> http://wiki.freeswitch.org/wiki/Channel_Variables#originate_timeout
> I figured out that originate_timeout must be passed as
> {originate_timeout=<timeout>} in front of the dial string to have any
> effect (setting it as channel variable as described in the example
> above has no effect).
> I have set the timeout to 1 second, so expected behavior is to try the
> second gateway if no response is received from the first one in 1
> second. The problem is that FS cancels the first request with
> [NO_ANSWER] and tries to route the call via the second gateway even
> though it receives response from the first during that 1 second.
> The response received is "100 Trying" provisional response (checked
> with sofia siptrace). I'm guessing that either 100 provisional
> responses don't cancel the originate_timeout timer (bug?) or I am
> doing it the wrong way.
> I was also thinking of using the timer-T1 or timer-T1X64 parameter in
> the sip profile, but I need this to be set per dial string, not per
> profile, besides, it seems that these timers (T1, T1X64) affect both
> invite and non-invite requests, so this is not really an option.
> Also, I tried leg_timeout, but it doesn't really do what I need it to.
> Anyone has any idea how to implement this?

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