7841 IP Phones are automatically changing the time
Currently running UCM 9.1.2 cluster.
We are having facing a problem related to time change on the 7841 IP Phones. These phones timing changes automatically and after some time they will revert back to the currect time. But other model IP phones are doesn't have this problem.
The existing firmware on 7841 is : Sip78xx.10-1-1-9.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...