Hello All,
We are facing one issue on Cisco 7821 IP Phones. This issue is intermittent. Faced it twice in last few days.
Conference call goes in preservation mode. None of the parties in call can hear, No soft key works. And need to terminate conference call manually.
Phone display shows below messages.
1. Lost server connection - On top of the phone display
2. Conference call in preservation mode - On line-1 button.
How to troubleshoot this issue ?
Regards,
Aniket Raut
