I have a Cisco 2801 connected to a PBX. The remote IP telephones are connected through ATA devices.
I need to restrict the calls that VoIP phones can do through PBX.
For example, telephones 1 to 5 can call to numbers x, y and z. Telephones 6 to 9 can call to numbers a, b and c. And so on.
I have investigated about it and only find one possibility: CoR (Class of Restriction). But with this, my configuration grows very much, because CoR forces to create so many "dial-peer cor list" and "dial-peer voice x pots", one for each number restriction.
Is there any other funcionality to permit only certain numbers?