Are all of the handsets in the same Device Pool? Under Device pool, you can set the Date/Time Group (This can be configured under System). In the Date/Time Group you can set the timezones and the time-format for the phones belonging to that particular DT Group. Please check if all of these devices belong to the same DT group and no changes were made recently.
You can also download the configuration files for the phone which is showing 24 hour time and the one that's showing 12 hour time and see if there is any difference there.
Perhaps dbreplication did not make sure that the 'datetimesetting' tables are matched on the 2 subscribers.
admin: run sql select * from datetimesetting
will give you the output for all entries in that table. I would compare the entries from sub1 and sub2. But since sub1 is not reachable you can't compare. There is an entry in that table called 'datetemplate'. This determines the format.
Can you check this?
Once sub1 comes back up I suggest a utils dbreplication repair all to make sure all the tables are matched on all the servers. Mismatches can often cause unexpected behavior in the devices.
We have rebooted the phones that we in the 24-hour format and they now display in 12 hour format.
No setting changes were made in CUCM.
Looks like it may be a CUCM 8.6 bug where the time displays incorrectly if a CUCM Subscriber fails. Those devices that were previously registered to the failed subscriber did not switch properly to the remaining subscriber and a reboot or reset seems to be required.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...