How often or what causes a date and time update on a phone?

Unanswered Question
Feb 15th, 2007

How often should a phone check the CCM server for a date and time update or what causes an update? I have a 7940 and a 7960 in my lab and I was doing some DST testing. The phones have been idle since I changed the date and time on the CCM server and it's been about 18 hours and the phones haven't updated yet. If I place a call from the phones, then the date and time will update. Is this normal behavior?

I have this problem too.
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rob.huffman Thu, 02/15/2007 - 07:48

Hi Mike,

My understanding is that this is expected behaviour. The older (non-Java) IP Phone updates its time at the completion of a call or if it is restarted. Usually I would reset the phones to "jump start" the process.

Hope this helps!


mchandak Thu, 02/15/2007 - 10:09

If u want the time to be updated on all the phones after changing the time, restart tftp server and reset the phones.

From what I can remember, the phones poll for the new time around 1 or 2 AM everyday. Also, after the phone is used the time is reset as the last msg always sent to the CM after a onhook msg/return to default screen is that update the date/time

MikeTomasko Thu, 02/15/2007 - 10:12

I changed the date and time on my CCM server about 3 PM yesterday and as of 9 AM this morning, the date and time never updated. They didn't update till I completed a call on the phone. It was a 7940 and a 7960.


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