Hi,
please provide topology and protocols.
best way is to check debugs and traces using called and calling number.
you need to follow few steps,
check call is coming to your network first on end point like MGCP/H323 gateway or CUBE
then check you have proper config to relay that to CUCM
then check respective debugs on device for same
see what message you get in debugs for call clearance
hear what promt is played if call is not hitting the number as CUCM and Service provider has different promts.
then check CUCM traces for that call
Hope this helps.
Please rate helpful.
