SMC Networks SMC7004ABR V.2 - Manual (Page 47)

Configuring the Barricade™ Router
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System
Time Zone
For accurate timing of client filtering and log events, you need to
set the time zone. Select your time zone from the drop-down list,
and click NEXT.
Check Enable Automatic Time Server Maintenance to
automatically maintain the Barricade™ Router system time by
synchronizing with a public time server over the Internet. Then
configure two different time servers by selecting the options in
the Primary Server and Secondary Server fields.