I have to help Rightfax vendor to integrate it with CUCM at my customer's location. It should go over h323 gateway (same thing with GFI faxmaker in my company works well). When we try to send fax from fax server back to fax server, it works well (goes over CCM). However when we try to send it from the outside or even to call fax number from IP phone, Rightfax doesn't seem to get the route code(DID/DNIS) and doesn't know how to route the incoming fax. The situation is more complicated as the Rightfax vendor doesn't have CCM knowledge or instructions about the setup, and we are not allowed to give each other's passwords. I tried all possible h323 settings about it's always the same.
If anybody had similar experience please let me know,