Changing IP Phone time settings

Unanswered Question
Sep 18th, 2007


We are using CCM 4.1(3),some of the IP Phones are showing incorrect timing on the display. Pls let me know how to change it to correct time.


I have this problem too.
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mchandak Tue, 09/18/2007 - 05:59

What phone models are showing incorrect time and how off are they. One thing you can try to do is update the phone config/restart TFTP Server and then reset the phones once.

mchandak Tue, 09/18/2007 - 06:07

Have you tried to reset the phones to check if that changes anything ?

mchandak Tue, 09/18/2007 - 06:18

Can you check and see if the phones are not running an old firmware. If yes, you should upgrade them to a newer version.

Also, the phones try to sync the time with the CallManager at 2 AM everyday. And ensure that Timezone configured for these phones are correct and match the settings of the phones which display the right time Tue, 09/18/2007 - 06:42

All the IP Phones are having Date Time Group Configured as a Indian Standard Timing.

Is it we need to do any individual configuration for time setting on IP Phones?


mchandak Tue, 09/18/2007 - 07:19

No, that should be it. How many mins/hours is the phone off the correct time ? Tue, 09/18/2007 - 21:04

The max time difference we found of about 30mins from correct time. Remaining are 10mins,17mins,5mins.. etc.

clheighway Fri, 10/26/2007 - 12:28

The oddity is that the times differ on different phones. Our time was off by a couple of minutes on all phones so we ensure all of our call managers were pointed to our NTP server and under the service made sure it was set to automatic so if the servers reboot the service starts. CM 4.1(3) 7940 and 60's


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