CUCM 6.1.4 (with CER)
We've got an existing PBX who's calls flow through our CUCM to the PSTN (in and out). Inbound from the PSTN is working just fine. Outbound the PBX only pulses 4 digit extensions for the source (calling party); Which is great for us on the Cisco side for interoffice calls, not so much on calls directed to the PSTN. So many questions, not sure where to start...
-How can i prefix calls with only 4 digits to the PSTN with the full 10 digit for proper callerID when the PSTN gets the call?
We have about 3-4 number/prefix ranges (all 8xxx numbers get a (847)555- prefix while all 5xxx numbers get an (847)444- prefix) for our entire organization. This means that 8123 may be on CUCM, 8122 may be on PBX. Which brings me to the next question...
-How can i keep this from affecting the existing CUCM calls going out the same gateway that do send the proper 10 digit callerID?
We're also using CER to modify 911 calls with new numbers for E911 that identify location and such. These calls go out over the same gateways with the standard Cisco transformation patterns and such on the gateways.
-How do i keep it from messing with CER as well?