ZyXEL Communications NSA-2401 User Manual page 123

• The time server is no longer reachable.
• The NSA is shut down often. The NSA internal battery keeps time when the NSA is shut
down and this may cause possible variance.
• A power surge occurs.
The NSA gives no warning if time lag occurs. You should resynchronize the time after a
power surge or after you have shut down the NSA several times.
NSA-2401 User's Guide
Chapter 5 System Setting Screen
123