we have cucm 9.1 and gateway 2911 on the side A and on the side B we have uc540 , we have configured tunnels between 2911 and uc540, calls from cucm SideA to uc540 Side B is ok and working fine. now we have one 9951 phone which gets ip from uc540 (side B) and tftp is our cucm IP.9951 phone is registered in cucm and calls from cucm to that 9951 phones are working fine. now problem is call is one sided between uc 540 local extension and ip phone 9951.
9951 which is registered on cucm can call uc 540 user but spa 504 phone which is registered on uc540 cant call to cisco 9951 phone gets error "unknown number"
i am attaching debug voice ccapi inout with this
kidnly help me to solve the issue ASAP