While changing service providers on a CS1000 5.0 I found out during testing the protocol on the new providers pri was NI2. So I Deleted the DCH, Route,trunks and rebult them with the NI2 protocol.During testing with a test number I didnt notice any problems. So they ported the numbers and now I when DID calls are answered you have to select the line button use the handset. Just picking it up creates no talk path also DID calls will not route to callpilot after 4 rings the calls drop. Ive tried rebuilding the route multiple times with no success. Has anyone heard of these type of symptoms? This switch uses all IP phones.