[cisco-voip] Phones and time settings...

Ryan Ratliff rratliff at cisco.com
Mon Mar 3 12:08:03 EST 2008


I'm not 100% certain on the newer phone models but the 7960/40, etc  
get the time from CM every time they make a call.  To sync these back  
up simply go off-hook and on-hook again.

-Ryan

On Mar 3, 2008, at 12:09 PM, Tim Reimers wrote:

Hi all -

I've heard it said that phones (CCM 4.1x, 79XX SCCP) do not  
necessarily update their time until the phones are rebooted.
Servers appear to be keeping correct time, but phones seem to drift  
off and users complain, until phones are rebooted.

Is this true? If so, can it be corrected by passing an NTP server  
setting in DHCP to the phones?

Tim Reimers
Assistant Network Administrator
Asheville City Schools
Desk- 828-350-6195 Mobile-828-545-3104
fax- 828-255-5454

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