I have a Customer who requested the ability to make international calls (by default we only allow National calls) so I set his DN in our INTERNATIONAL CSS.
He can now make international calls, but I just got the following ticket in for him:
"Customer reports when people call him (from overseas) they receive a this number is not in service message. Their calls ring twice and when he picks up no one is there."
Um, What?!? How to they get a not in service message, but your phone rings?!? how do I even begin to troubleshoot inbound international calls? DNA? We are running CUCM 11.5.1 out two ISR 4431's to the PSTN.