American Fibertek N-TAH - Manual (Page 33)

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Watchdog
The N-TAH has a watchdog function which can be used to monitor up to two network-
connected devices for failure, and perform user-configurable actions when that device
fails to respond.
When the Watchdog feature is enabled, the N-TAH will send ping requests to the target
IP address at a frequency determined by the Interval setting. The N-TAH will wait for a
period of time determined by the Timeout setting for a response to each ping message.
If it does not receive a ping response for a ping, it will increment a counter which records
the number of consecutive failed pings. A single successfully received ping response
will set this counter to zero. When a number of failed ping responses equal to the
Failures setting has occurred, the unit will take some action as determined by user
settings. It will then wait for a number of minutes determined by the Restart Delay
setting before sending any more ping messages.
Setting Default Value Range
Enabled Not Enabled Enabled
Not Enabled
Ping IP Address 0.0.0.0 15 characters
Interval 15 seconds 1-9999 seconds
Timeout 3 seconds 1-9999 seconds
Failures 3 1-9999
Restart Delay 5 minutes 1-9999 minutes