Customer has a SV 9100 at the main office. There are 3 other locations she has as well. The MAIN thing is that Caller ID on outgoing calls form ALL locations to show the number as it is now. She wants to integrate all stores to the main. Right now each store is independent with there own phone numbers. 2 locations can not port the numbers due to the Rate Exchange. Programming needed can be done to connect all stores but Caller ID is the problem. Right now all analog trunks but this can be changed if I knew what to use.

Suggestions?