[asterisk-users] zap fallback

Eric "ManxPower" Wieling
Fri, 18 May 2007 11:01:41 -0000

Steve Kennedy wrote:
> I'm trying to get zap fallback to VoIP working. I dial the zap channel
> and if it fails I want to then try another route.
>
> If the channel is busy (i.e. CHANUNAVAILABLE) it works, however if
> there's no dial-tone, it doesn't seem to detect this?
>
> Using a TDM400 with UK settings.

The TDM400P does not detect dialtone.  It also does not detect if there
is voltage on the line.  Make sure your lines are working.