I am working with a customer who is implementing two PRI?s for PSTN access. My questions are;
a) is NFAS really necessary with only two PRI?s, if so, what configuration does the telco have to do to support this
b) if I don?t use NFAS, what is the best configuration to use on the router and CCM
Gateway will be H.323 and CCM 5.1
Correct, since the PRIs are going to terminate on the same PRI you will only have one GW in CM.
So, there are couple of ways to make this work:
1. use seperate dial-peers with preference command defined
2. Create a trunk group and associate the trunk group with the voice-ports and dial-peers