I got a customer in which is using legacy Nortel PBX talking, all users are assigned with 4-digit extension number, range from 0000 to 9999. Now they are migrating to CCM 3.3.3. A 3640 voice gateway is now connected to the PBX for providing connection between IP Phone and legacy phones. A route pattern xxxx pointing to this gateway is configured in CCM for IP Phone calling to legacy phone. On the other hand, user will keep the same 4-digit extension as using in Nortel PBX, that means users IP Phone extension will surely fall into the range of 0000 to 9999. When an IP Phone(with DN 1234) call another IP Phone(with DN 5678), will it fall into the XXXX route pattern, or just directly go to the phone 5678?May I ask also that is there any conflict to create the route pattern xxxx in CCM for this case?
thanks a lot