In my VoIP network, I am using CUCM 6.1 and Cisco IP Phone(7931/7911). I have two MCS 7835 Server( One is using as Primary and another as Secondary).
Some of the Phones some times getting down and showing an error message "UCM Down". and after some times its again getting register autometically with Secondary, after some times again its getting register with Primary server though in WAN link no Link issue is there.
Anybody is there to help me out from this type of problem.
Thanks & Regards