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

[Bill Simon]

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