The below message is what i am getting on a 3845 router. I had upgraded the IOS and had to roll it back. Users are unable to reach extensions and the call manager is reporting "we are currently experiencing call problems. Are there any suggestions to resolve this issue? I searched around but I don't have any clear answers as what would need to be done to clear up this error message.
%SIP-3-BADPAIR: Unexpected event 5 (SIPSPI_EV_CC_CALL_ALERTING) in state 7 (STATE_ACTIVE) substate 0 (SUBSTATE_NONE)