On May 18, 2007, at 11:50 AM, 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.

Asterisk does not do dialtone detection before it starts using a zap channel. That's probably why you are seeing this behavior.

Matthew Fredrickson

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