User's Manual

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NHD1W User Guide
System Monitor
The System Monitor page is used to configure the behaviour of the Periodic Ping
monitor function.
Figure 31: System Monitor Settings
The Periodic Ping Reset Monitor configures the NHD1W to transmit controlled ping
packets to 2 specified IP addresses. If the NHD1W does not receive responses to the
pings, the NHD1W reboots.
This works as follows:
1. After every “Periodic PING Timer” configured interval, the NHD1W sends 3
consecutive pings to the “Destination Address”.
2. If all 3 pings fail, the NHD1W sends 3 consecutive pings to the “Second
Address”.
3. The NHD1W then sends 3 consecutive pings to the “Destination Address” and 3
consecutive pings to the “Second Address” every “Periodic PING Accelerated
Timer” configured interval.
4. If all accelerated pings in step 3 above fail, the number of times configured in
“Fail Count”, the NHD1W reboots.
Note: Do not set the “Periodic PING Timer” to a value less than 60 seconds; this is to allow the
NHD1W time to reconnect to the 3G/4G network following a reboot.
5. If any ping succeeds, the NHD1W returns to step 1 and does not reboot.
To disable the Periodic Ping Reset Monitor set “Fail Count” to 0.
Note: The traffic generated by the periodic ping feature is counted as chargeable usage;
please keep this in mind when selecting how often to ping.
Configure a Forced Reset
The NHD1W can optionally be configured to automatically reboot after a period of
time specified in minutes. This ensures that the NHD1W will restart if some anomaly
occurs. This is useful in remote installations.
This feature is available by clicking Services > System Monitor.
The default value is 0, which disables the Forced Reset Timer. The maximum value is
65535 minutes.