Both these devices are integrated over H.323. Avaya PBX is configured as h.323 gateway in CUCM. I am facing two problems:-
1. If Avaya phones calls Cisco IP phone, the call gets connected but the caller id is not displayed on Cisco IP phone. Cisco IP phone displays as unknown number.
2. If Cisco phone try to call Avaya phone the call does not get connected & user hear fast busy tone. In dial number analyzer tool it shows that call is getting properly routed to h.323 gateway (Avaya PBX).