American Fibertek N-TAH - Manual (Page 34)

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Watchdog failure actions
When the N-TAH fails to receive a number of consecutive pings from the target device, it
will trigger the local AUX contact output for a time period determined by the Aux Time
setting. This output is intended to be used to trigger an alarm buzzer or light, or to cycle
power on a small DC-powered device. The contact is rated for 42 volts, up to 1 Amp
current, and should not be used to switch line voltage or any device which draws more
than 1 Amp.
The N-TAH can also optionally send a TCP message of up to 40 characters to a target
address on the network. IP:PORT indicates the network IP address and port of the
target device. This may be up to 24 characters long and must consist of an IP address
in dotted-quad format, followed by a colon, followed by a port number in the range of 0 to
32767. The default setting of “0.0.0.0:23” indicates no action to be taken.
The TCP Message field holds a text message of up to 40 characters. When a lack of
ping response occurs, this message will be sent to the specified network address.
The Email Message field holds a text message up to 80 characters long which will be
sent to the email address specified in the IP Ethernet Setup screen. If a message is
specified here, it will be sent to this address when a watchdog failure occurs.
The Test Restart button is used to manually trigger a Watchdog reset. This will trigger
the aux output to occur, and if specified will trigger a TCP message to be sent and an
Email notification to be sent.
Setting Default Value Range
Aux time 15 seconds 1-9999 seconds
TCP Message 40 characters
IP:PORT “0.0.0.0:23” 24 characters
Email Message 80 characters