[cisco-voip] 3rd-gen and newer IP phones 5-10 seconds slow

[Bill Simon]

Watching the minutes number change.  Also you can see the seconds field 
if you connect to the phone's web interface.  On my 7965 it appears to 
be exactly 9 seconds off.

Lelio Fulgenzi wrote:
> OK, silly question, how do you know it's 5-10 seconds slow? Do you have 
> seconds display somewhere or are you just looking when the minute number 
> changes?
> 
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> "Bad grammar makes me [sic]" - Tshirt
> 
> 
> ----- Original Message -----
> From: "Bill Simon" <bills at psu.edu>
> To: "Cisco Voip" <cisco-voip at puck.nether.net>
> Sent: Friday, May 8, 2009 5:10:44 PM GMT -05:00 US/Canada Eastern
> Subject: [cisco-voip] 3rd-gen and newer IP phones 5-10 seconds slow
> 
> Running CM 4.1.3 with NTP configured on all servers to sync to two
> reliable NTP sources and peer with each other for verification.
> 
> I run ntpq and check each server and all are synced up.
> 
> My 7940s and 7960s are right on time.  But newer phones, 7961, 7965 and
> 7906 are anywhere from 5 to 10 seconds slow.
> 
> I am aware that older phones used SCCP messages to sync time, and newer
> phones appear to use a different method.  SIP firmware loads use NTP;
> what do SCCP firmwares use?
> 
> Even after a **#** reset, the phone's time is lagged.
> 
> Is this a defect of the Java-based firmware, or do I have another issue
> within the system causing the lag in the time displayed on the newer phones?