CUCM 8.6.2 - IP Phone 7940/7960 don´t change the time when finish DST

Hi Guys,
My Customer is having the problem about DST (date summer time) specifically about IP Phone 7940 and 7960. When finish the date summer time this model don´t change the time, only after restart logical or phisical. I simulated the problem in the CUCM with the same version 8.6.2.22900-9 and the problem too occur. I did the following procedure to try solve the problem:
1) Put the lastest version firmware about IP Phone and didn´t worked;
2) Put the lastest version dst and didn´t worked;
I search about any bug related and didn´t found nothing.
Any have idea about this?
Thanks,
Wilson                  

Hi Wilson,
Try installing TZ updates with steps in the document:
http://software.cisco.com/download/release.html?mdfid=283782839&flowid=45898&softwareid=282074298&release=8.6%282-2013d%29&relind=AVAILABLE&rellifecycle=&reltype=latest
Please find the link for EOS and SW Maintenance for 7960
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps379/end_of_life_notice_c51-574072.html
Hope this helps!!
Regards.
Tirtha

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