2851 router running 12.2(24T2), connected to a PRI
If the PSTN calls the DID of the remote destination profile for Phone1/DN1, the remote destination see's the PSTN calling number.
If the PSTN calls the call handler (Unity Connection), then dials the DN of the remote destination profile for Phone1/DN1, the remote destination see's the PSTN calling number. Note, this required changing the service parameter in CUCM to use the originating DN and not the voice port DN to work properly.
When the PSTN calls Phone2/DN2, then Phone2 transfers the call to the remote destination profle for Phone1/DN1, the calling number shown on the remote destination is the the external phone mask for Phone2/DN2. However, Phone1/DN1 shows the the PSTN calling number.
What can I do to make sure the the PSTN calling number is displayed on the remote destination when the call is transferred from an internal phone?