[cisco-voip] Fwd: NTP Reference for IP Phones

[Ryan Ratliff]

You need to be more specific on your phone model and version.  The  
3rd gen phones (79x1, 79x2, 79x5, 7970) do their own DST  
calculations.  The other phones get their time directly from CUCM.

If your phone or CUCM isn't updating the time correctly then you need  
to set the date/time group to let them have the right time manually.

-Ryan

On Feb 17, 2009, at 7:13 AM, Marcelo Zilio wrote:


Someone? Please...



---------- Forwarded message ----------
From: Marcelo Zilio <ziliomarcelo at gmail.com>
Date: 2009/2/16
Subject: NTP Reference for IP Phones
To: cisco-voip at puck.nether.net


I'm having some troubles because daylight saving time in Brazil.
Last weekend we got back to "normal" time and every host in the  
network update clock fine but the phones.
Phone NTP reference is configured OK, CallManager clock is OK.

I've searched for some patch but I think Cisco doesn't release this  
kind of patches for Brazil.

My NTP Server is a 2801 router. Is there some way to know if the  
phones are really looking for a NTP server or they just have a  
"cache" hour?

CallManager version is 5.1.3
Firmware version 8.0

Thanks,
Marcelo

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