[Asterisk-Users] IAX busy signalling?

[Roy Sigurd Karlsbakk]

>> Now if a number is dialled, and that number is not in use, blocked due
>> to lack of paying etc, I want to signal that back to the PSTN gateway,
>> making this playback or playtones to avoid picking up the phone.
>
> Just don't "Answer" the call.  And when you decide you're not going to
> send the call anywhere, use "Hangup" to get rid of it.

The problem is that I need the PSTN gateway to know if the call was 
busy, unavailable, blocked, number unused etc, and then play a message 
indicating that.

roy