6900 Phone Series Clock Summer-Time

[Moshtabaa]

hi guys

i have a problem with phones clock on 6900 series (6941 , 6945,6921 )

From 22 september, Hours go forward one hour, but this phones don't update summer-time clock

we use CUCM 11.5, and CUCM pub and all subscribers clock are correct , NTP Servers are correct , too

but this phones clock not corrects

we use last firmware, for example 6941 firmware is: 9.4.1.3.Sr3

please help

[Gilmar Silva · Accepted solution]

Hello,

Some older phone series has bugs related to DSTs time-zones (ex: link bellow).

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuf76755/?rfs=iqvred

If you enable the "web access" under the phone configuration (device > phone) you will be able to see what is the exactly time zone that the phone is using.

With this information you may check if it matches with the date time group.

An useful workaround is create a new date time group and device pool for the IP Phones 6900 and set other time zone that matches with your current DST time zone (you may try with a single phone first, before apply this to all 6900 phones).

You may also try to update the phone firmware or install the last CUCM Time Zone Update.

Regarding the CUCM time zone updates, the last one (link bellow) was released in "23-APR-2018" with the code "2018c". You may check the CUCM current time zone verstion with the command "show timezone config".

https://software.cisco.com/download/home/286306100/type/282074298/release/11.5%25281-2018c%2529

Regards,

Gilmar Silva

[Moshtabaa]

tnx, it's work very good