We have two PBX's. Our existing PBX is a Nortel Meridian which houses phones and is our tie to the PSTN. We have began the process of migrating phones over to our CM server running 5.2 We have a 3725 H.323 gateway that sits between the two PBX's - IOS v12.4(10c).
Call Flow - IP phone---CCM-->Gateway (GW)-->PRI-->Nortel---->ext.
When a user on the Nortel side places 'Forward all calls' on their phone to an external DID and someone from the Cisco side try's to dial the Nortel's extension they get a fast busy.
Please find the attached partial config and some debug. Any thoughts would be greatly appreciated.