[asterisk-dev] Overlapped dialling on SIP trunks for outgoing calls

[Klaus Darilion]

Johansson Olle E schrieb:

> I will have to clarify documentation here, because as I said, I hadn't  
> thought of it from your perspective.
> We do support overlap on incoming calls, but not on outbound. My  
> question, since this is the developer
> list, is how to implement this on the PBX to chan_sip interface - how  
> would I know when to go into
> overlap mode on SIP. Or actually, if the sip trunk provider sent me a  
> 484 - what would I return to the PBX
> to request more digits?


In ISDN there is cause 28:

Cause No. 28 - invalid number format (address incomplete).
This cause indicates that the called party cannot be reached because the 
called party number is not in a valid format or is not complete.

So what about AST_CAUSE_INVALID_NUMBER_FORMAT ?

regards
klaus