[Asterisk-Users] no audio on fxo line

[Rich Adamson]

> I got back from two weeks away and appear to have lost audio on my 
> tdm411 fxo. Everything was working properly when I left. I checked the 
> logs, config files and can't see any problems, the zap channels and 
> modules are all loaded properly, asterisk starts without probs and 
> everything looks sweet on the colsole with -vvvvvvvvc when I make calls, 
> but I just don't hear a dialtone or any audio anymore.  I tried opening 
> the sound monitor and that looks as though appropriate sounds are being 
> sent.  When I pick up the handset all I can hear is a slight crackling 
> noise. The fxo line rings but I don't hear audio through any phones 
> connected to it..
> 
> I'm not really sure what I can try to resolve this - has anybody got 
> some suggetion?

Check to see what revision of TDM card you have. The rev E/F cards and
earlier had a problem that sounds just like what you are hearing and
the only fix is to replace the card. Contact support at digium.

The problem usually happens anywhere from one to two weeks after a
reboot. Stopping asterisk, unload and reload the drivers, and start
asterisk also clears the problem without a reboot.

Since the card has a two year warranty and hasn't been out that long,
you should be able to get digium to replace it at no cost.