Cisco 8841 rebooting everyday

[DenisV09151]

Good day.
We have two 8841 phones installed in the Call Center. One of them constantly reboots about 1 time per day.

According to RTMT data, the reason for reloading is CTL / ITL file update:

Severity: Error

DeviceName = SEP8480XXXXXXXXXX

UNKNOWN_PARAMTYPE: StatusCode = 1

Enum Definitions - StatusCode:

1 - Update to new CTL and / or ITL success.

What could be the reason?

CUCM 10.5.2
UCCX 11.6.1

Cisco 8841 sip88xx.12-7-1-0101-415

Thank you!

[pieterh]

does this document apply to your configuration? IP Phone Security and CTL (Certificate Trust List)
that is: do you have this additional security enabled?

[Nathan Gageby]

What is the reason from the phone webpage?  Do you have any errors about firmware on the phones screen?  Have you performed a factory rest on the device?

[DenisV09151]

No reason from the phone webpage.

No errors.

Factory reset didn't help.