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

[Marcelo Zilio]

Thank you for your reply,

Some 7960 with 8.0(7.0)
Some 7912 with 8.0.2(060817A)

I've changed Time Zone in Date/Time Group Configuration and now phones are
showing correct time, but I think this is not the correct behavior...

Just another question. You said some phones get their time from CUCM, so
what is the meaning of the "Phone NTP Reference" under System menu?

thank you
Marcelo

2009/2/17 Ryan Ratliff <rratliff at cisco.com>

> 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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