Hi Jaleel,
Which IOS version and CCM version you are running?
It may be related to these DDTS, they explain why the FXO port is transitionint to OFF-HOOK state.
Are you using LS or GS?
CSCdu84171
Externally found enhancement defect: New (N)
mgcp ls endpoints should not go offhook until connect.
CSCdu84215
Externally found enhancement defect: New (N)
need plar opx functuality with mgcp for analog loop start trunks.
You can configure the gateway as H.323 with connection plar opx command.
//G