[Asterisk-Users] ID for outgoing calls from DDI (DID) line

[Peter Svensson]

On Thu, 16 Sep 2004, Maros RAJNOCH wrote:

> in my * I have one ISDN BRI line with DID (DDI) preselection.
> so in fact I have 100 extensions: +421 33 12 34 56 xx
> 
> Q: Is in my power -- or in power of * -- to influence which of these
> extensions will occur in my cellular display?

I guess you mean you cant to control which of your assigned ddi extensions 
show up as callerId to the remote party when calling our from your 
asterisk pbx?

That is possible in principle, provided your pstn provider lets you. You 
also have to agree the the format (TON and numbering plan) possibly the 
number of digits to send. Then asterisk will pass whatever is set with 
the SetCallerId() application in the dialplan or set in the sip.conf etc 
files for each internal extension.

As an example, we send three digits which just happens to match our 
internal extensions so we do not have to fiddle with SetCallerId. In 
zaptel.conf we have 
  prilocaldialplan=unknwon
since that is what our pstn provider wants.

Talking to your pstn provider may save you a lot of trial and error.

Peter