User`s guide

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This checkbox opens to show the following parameters:-
Send n byte pings to IP host a.b.c.d every h hrs m mins s secs
If this parameter is set, the router will automatically generate a “ping” of n size to the IP
host specified (IP address or hostname) at the interval specified. Deleting the IP host
value disables the monitoring ping facility.
This parameter in conjunction with “Reset the link if no response is received within s
seconds” can be used to configure the unit to use a back-up interface automatically
should there be a problem with this interface.
Note:
The n parameter specifies the PING size when using monitoring ping feature. The size
indicates how large the ICMP packet should be excluding the size of the IP header.
Send pings every h hrs m mins s secs if ping responses are not being received
If this parameter is set, the router will use this value as the interval to ping at when
more than one ping request sent out the PPP interface is outstanding. This should be set
to a shorter interval than the above ping request interval so that the router may more
quickly react to a broken PPP link.
Switch to sending pings to IP host a.b.c.d after n failures
This allows a for more reliable problem detection before fail over occurs by testing
connectivity to 2 IP addresses/hostnames. If an IP address or host name is entered and
the n parameter has a value greater than 0, when a ping failure is detected on the
primary IP address, pings will be sent to this 2nd IP address/hostname. This is to ensure
that if the main IP address becomes unavailable for any reason and stops responding to
ICMP requests, the router will check another IP address before starting fail over
procedures.
Ping responses are expected within n seconds
If this parameter is set to a non-zero value the unit will wait for the interval specified for
a response from a PING request before applying the “Send pings every h hrs m mins s
secs if ping responses are not being received”. If this parameter is set to 0
(default), the time specified in the in “Send n byte pings to IP host a.b.c.d every h
hrs m mins s secs” is allowed before applying the “Send pings every h hrs m mins s
secs if ping responses are not being received”.
Only send Pings when this interface is "In Service"
When enabled this parameter, ICMP echo requests will only be sent from this interface
when it is in service. The default setting is off and ICMP echo requests are sent when the
interface is in service and out of service.
New connections to resume with previous Ping interval
When enabled, this parameter controls the ping interval after the mobile interface has
been de-activated and then re-activated. It sets the ping interval to the same interval in
use when the mobile link last disconnected.
Reset the link if no response is received within s seconds
This parameter specifies an amount of time after which if no ping response has been
received, the unit will terminate the mobile connection in an attempt to re-establish
communications. Because by default the mobile link is always on, the unit will
automatically attempt to re-establish a PPP connection that has been terminated.
Use the ETH 0 IP address as the source IP address