I have configured a CCM server (version 4.2.3 ) and using MGCP gateway. We have say about 100 extensions (IP Phones), the extesion numbers range is from 2100 to 2199. Now when we place a call from any extension (outside calls to PSTN) the caller id is getting displayed is 2100 only (ofcourse with PSTN prefix).... what could be the problem why the caller id is not getting displayed as same as the extension number (along with the PSTN prefix)
Some inputs pls...
P.S. We have DID for these block of 100 numbers (2100 - 2199), and the incoming calls land on the extensions properly..