[Asterisk-Users] Special handling of IAX circuit-busy vs busy

[Kevin P. Fleming]

dobrien at trilogy.com wrote:

> Is there a way to change our dialplan to fail to PSTN in case Dial(*) 
> reports circuit-busy (but not busy)?  I'd like to send to another part of 
> extensions.conf, where we'd try Dial(Zap).  We're already using the n+101 
> extension to handle the busy condition with the Busy() app.

Dial will report CONGESTION in this case, which is separate from BUSY. 
This should be available in the DIALSTATUS channel variable after Dial() 
returns.