[asterisk-users] dial_exec_full problems with TDM400

A J Stiles asterisk_list at earthshod.co.uk
Tue Aug 17 04:36:13 CDT 2010

On Tuesday 17 Aug 2010, Jason Morgan wrote:
> Hi,
> I was running asterisk 1.4, but recently upgraded to 1.6 (for fax support)
> at the same
> time as moving from Ubuntu hardy to
> I have a single TDM400P rev I with two fxo and two fxs modules, these were
> working perfectly for years
> on Asterisk 1.4 using Zaptel drivers with Oslec.
> Now I've moved to 1.6 so I am using Dahdi.  Distribution is stock ubuntu
> package.
> After several hours (perhaps 24 or so, not nailed it down precisely)
> incoming
> calls are not answered and outgoing calls get dial_exec_full.
> Incoming calls are reported to either A:just ring and ring, or B:get an
> engaged tone.
> Strangely when this happens asterisk DOES see the incoming call in
> situation A, but fails
> to answer.
> What tests can I do to resolve this as it is very inconvenient as we are
> missing a lot of calls?

Have you got any extensions defined that aren't physically connected to 

I replaced an ancient Asterisk version with a bang-up-to-date 1.6 version I 
built myself, and was getting similar symptoms to what you describe.  It 
seemed not to be freeing up channels it was trying to associate with 
non-existent devices.

I made sure that every entry in sip.conf had a corresponding phone plugged in 
somewhere, then went through the dialplan and removed all references to 
anything that wasn't mentioned in sip.conf.  (And there were a few.)  It 
seems to have stayed up since then .....


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