7941 phones w/ UC520 loosing time

Unanswered Question
Feb 23rd, 2009
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Where do phones connected to a UC520 get their time? I have a site where all phone display's are off by 4 min.

The IOS is set to use a .gov NTP.

And Unity Ex is set to use the same NTP

CCME is coded in system time, yet all seem off

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Nicholas Matthews Mon, 02/23/2009 - 08:28
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The phones get their time via SCCP messages which are based off of the UC520 clock.

Use these commands to make sure your NTP is configured correctly:

show ntp association

show clock

Otherwise, you can try upgrading your phone firmware as that fixes a large percentage of time problems (notably DST).




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