I have the problem and the question is exactly the same as Mark_Logan asked auser on » Wed Oct 07, 2009 11:50 am.
I have a ISDN PRI. (E1)
My 30 phone numbers are between +40312XXX300 -> +40322XXX329
When I call outside, mobile, landline, the phone number is always the same (+40312XXXX00)
Interesting fact is that, if I call from the outside to +40312XXXX317, it rings.
I need that when I call from +40312XXX321, for example, to a cellular phone to see that +40312XXX321 is calling and NOT +40312XXXX00.
Thank you in advance for your responses.
P.S. I tried to modify in sip.conf the caller id, but, when I call internally I get the full number, not the extension. So, when the users want to return missed calls they return them by dialing the full number which is a taxed call.