[Freeswitch-users] T316 timed out, resending RESTART request

Ashish gautam ashish at nms.co.in
Mon Apr 8 16:23:01 MSD 2013


Thanks Martyn for your response.

Yes some calls go out ( nearly 4 simultaneously ) and for the rest, it
shows congestion. I have checked the signalling protocol its fine. Out of
the 30 channels 4 get restarted normally (probably this is the reason why
only four calls can go out) and rest are not, they remain in the suspended
state.

--Ashish

On Mon, Apr 8, 2013 at 5:30 PM, Martyn Davies <martyn at magiccow.co.uk> wrote:

> The RESTART is sent out for PRI (and ISDN) when the signalling is
> first established, or the link to the switch needs to be restarted.
> If the switch does not respond to RESTART (and the timer T316 expires
> - IIRC this is a long timeout), then no channels will be available for
> calls.
>
> The first thing to check I think is that your PRI board is definitely
> set to the right variant of signalling protocol, so that it matches
> that at the switch/provider.  There are many variations of protocol
> (NI-1, EuroISDN etc), and if there's a mismatch it could be that one
> end or the other is using RESTART to try to recover the link after
> some kind of failure.
>
> Tell me, do any calls go out at all? Or is it that some calls go out,
> then you get congestion?
>
> Regards,
> Martyn
>
>
> On 8 April 2013 06:09, Ashish gautam <ashish at nms.co.in> wrote:
> > Hi,
> >
> > I am getting this warning: "2013-03-15 12:25:15.816238 [WARNING]
> > ftmod_libpri.c:1954 [s1c29][1:29] -- T316 timed out, resending RESTART
> > request" when I start my FS box.
> >
> > After these warnings with three restart attempts I get this error:
> >
> > 2013-03-15 12:25:45.816239 [ERR] ftmod_libpri.c:1950 [s1c31][1:31] --
> T316
> > timed out, channel reached restart attempt limit '3' and is suspended
> >
> > I am also facing NORMAL_CIRCUIT_CONGESTION error when generation outgoing
> > calls through FreeTDM. Is this a bug?
> >
> > Kindly help.
> >
> > --
> > Ashish
> >
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