I am running CUCM 7.13b using DID's. When I set my phone to call forward all to an external number, the caller ID does not show my DID number only the billing number for our PRI.
Each line in the system is set with an External Phone Number Mask of either 290XXXX or 290(main number). Some of the DID's we do not want to appear on caller id so we mask them to a main number.
When I run a debug on the gateway the output shows that the calling number is 290(the last four of the original calling party). This of course is not a valid number on this PRI so telco changes it to the billing number.
Is there a way to have the call forward all present to telco the DID phone number of the phone that is doing the forwarding?