we have an issue with fxo ports
our deployment is
CUCM ----H.323 GW with FXO
Outgoing calls works fine ,but no incoming calls success .
This Gateway in Tanzania
kindly find attached
run config and debug commands
Check the codec on your SIP trunk on CUCM. VOIP dial peers use g.729 by default. You can change the dial peer with "codec g711ulaw" for example. Or change the region setting for the region assigned to the SIP trunk.