Cisco VoIP 8851 Phone Error

[alexanderthazhayil]

Hello:

I have a Cisco 8851 phone, that is registered to CUCM 10.5 and worked fine for a year. Phone restarted and getting " Device is out of Service" error. Any assistance greatly appreciated.

Alex

[Jaime Valencia]

Try to upgrade the FW on the device, you can also try a factory reset, if no avail, I'd call TAC

[alexanderthazhayil]

tried factory reset, but didn't resolve it. the phone is out of warranty.

[George Sotiropoulos]

In addition of what Java suggests you may also check, by using the IP address of the phone on a web page, the Device Logs to check if there is anything useful.

George

[alexanderthazhayil]

the phone does not register in cucm. Phone tries to boot, then error pops up.