CUCM 7.1.3 MGCP Gatways. All calls coming into campus from PSTN first touch the CUCM. If the extension caller is trying to reach is not on the CUCM, but on the old Rolm 9751, call is routed over another MGCP PRI to the Rolm System. PSTN > CUCM PRI > ROLM. Although the originator's CLI is something to the affect 5184431234, it appears as 7168881234 on the Rolm The 716888 is the college area code + exchange. I assumed the PRI between the CUCM and ROLM is doing a called party transformation, but I don't see on the PRI configuration. On a CDR dump, the CLI of the originating call is correct, however the dialed number is now the 7168881234. The significant digits for the call from the PSTN to the CUCM is 4. Significant digits from the CUCM to the ROLM is 4 also.
Where do look to see where the college prefix is replacing the CLI area code/exchange?