I need to connect my CUCM to ITSP Sip trunk directly. Sip trunk created, I have Outgoing calls without any problem but the problem is with incoming calls.
I found these errors in RTMT:
//SIP/Stack/Error/0x0/httpish_msg_free: Freeing NULL pointer!
//SIP/Stack/Info/0x0xf0e0b1c8/sentErrResDisconnecting: Sent an 3456XX Error Response
and the translation pattern already set.