EasyN NR-1-B Series - Manual (Page 27)

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3、Global Parameter
Enter the “Main Menu” --- select “Basic Setting” --- “Global Parameter” to set
“Device Port”, “Playback Port”, “Current Path”, “Alarm Port”, “Recording Package
Time”, “Probe Alarm Duration”, “Move Alarm Duration”, etc. You can also check
“Pre-record” and “Forward Service” to enable those two functions as you need.