Problem: Every couple months, the system time displayed on the phones will be slow by a couple minutes. As you can imagine, this can be very disconcerting to users who depend on that clock as a cue for when to leave the office.
1. I originally thought that the issue was related to system reboots…if the system rebooted, then it’s possible for the clock to stop incrementing while it is starting back up.  But the phone system is on a UPS and it tested fine, so I’m pretty sure it’s not reboots.Â
2. The second idea came from someone with an issue where their system time was jumping back and forth. One tech thought that it could be their phone system reading the time from the CallerID info that’s passed when the call is connected. A setting called Auto Time&Date was allowing the phone system to change itself as it wished. This sounds like the closest match to what I’m experiencing so I’m going to try it.
If you know how to log in to the system to program settings, go to System Programming and Feature Settings. It is called Auto Time&Date. Turn that to N and exit.
Then change the Time & Date to match your local time and monitor the result.
