User guide

ALEOS 4.3.4 Software Configuration User Guide
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Keepalive
Keepalive is used to test the connection to the cellular network by pinging an IP
address after a specified period of inactivity. Keepalive is only recommended for
users who have a remote terminated device that infrequently communicates to
the network or if you have experienced issues over time where the device can no
longer be reached remotely.
When Keepalive pings the IP address, an acknowledgment indicates there is an
active connection to the network. If the AirLink device does not receive a
response from the IP address, it makes additional attempts according to a back-
off algorithm before determining the Internet connection is not functioning
properly. If it determines the connection is not functioning, the device then
attempts to reconnect to the Mobile Network Operator to reestablish IP
connectivity.
Data Usage Using Keepalive
Keepalive is an optional feature. If you frequently pass data with your device, you
most likely do not need to have Keepalive enabled. When using Keepalive, be
aware that a ping moves approximately 66 bytes of data over the network and is
billable by the Mobile Network Operator. The following *IPPING settings incur
approximate monthly data usage in addition to any other data usage.
Command Description
Keep Alive
Keepalive IP
Address
The IP address that the AirLink Device pings to determine if there is Internet connectivity and make
sure this IP address is accessible.
Set the IP address or valid Internet domain name for the AirLink device to ping to keep itself alive
(online). *IPPING must to be set to a value other than 0 to enable pinging.
• d.d.d.d=IP address
• name=domain name
*IPPINGADDR sets the IP address you want to use for the connection test.
If *IPPINGADDR is left blank or is set to an invalid IP address (e.g., an IP which is unreachable or
one which is not a valid IP address), device performance is adversely affected.