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

[Lelio Fulgenzi]

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? 

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Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
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"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? 

Bill 
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