Motorola AP-7131N-FGR Product Reference Manual page 135

Time synchronization is recommended for the access point's network operations. Use the
Time Settings screen to enable NTP and specify the IP addresses and ports of available NTP servers.
NOTE The current time is not set accurately when initially connecting to the
CAUTION If using the Radius time-based authentication feature to authenticate
!
To manage clock synchronization on the access point:
1. Select System Configuration
CAUTION Ensure IPSec has been properly configured to protect communications
!
access point. Until a server is defined to provide the access point the
correct time, or the correct time is manually set, the access point displays
1970-01-01 00:00:00 as the default time.
access point user permissions, ensure
the Date and Time Settings screen's
selected, time based authentication will not work properly. For
information on configuring Radius time-based authentication, see
Defining User Access Permissions by Group on page
- > Date/Time
with the external NTP server. Changes will not be applied otherwise.
UTC has been selected from
Time Zone field. If UTC is not
from the access point menu tree.
System Configuration 4-45
Date and
6-67.