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Line Backup 7-11
Note: If you want the router to initiate the backup connection on loss of Layer 1 or 2 only (Physical or Data link
Layer), leave Ping Host Name or IP Address blank. Do not use 0.0.0.0 in this field. Hit the space bar or Delete
key to CLEAR the field totally. Leaving 0.0.0.0 in this field tells the router to ping an address that does not exist.
• Select Recovery to ADSL and press Return. Choose either Manual or Automatic to determine how the
system will return to the primary WAN link when it becomes available again. If you choose Automatic, the
next two menu items become visible.
Note: Automatic recovery only works upon loss of primary WAN connectivity.
• If you chose Automatic Recovery, select Requires Recovery of (minutes) and enter the number of min-
utes that the system should wait before it assumes that a connection has been re-established. This
allows you to be sure that the primary WAN connection is well re-established before the router
switches back to it from the backup mode. If the router's primary connection fails at layer 1, the
Requires Recovery of (minutes) parameter determines the amount of time the primary layer 1 connec-
tion must be up (recovered) before the router will tear down the backup connection and revert to the
primary interface.
• Select Clear Backup Call only if idle. The default Yes will prevent the backup call from being torn down if
there is activity on the backup connection when the primary connection comes back up. You can toggle this
to No if you wish.
The Clear Backup Call only if Idle timer is a separate timer from the Requires Recovery of (minutes)
timer. The router will first reach the Requires Recovery of (minutes) counter and count down to zero. Then
the router will consult the Clear Backup Call only if Idle timer to learn if the backup connection has been
idle for the specified seconds. If the connection has been idle for the specified seconds, then the teardown
process of the backup connection will begin.
• Requires idle time of (seconds) specifies how long the device should wait before permitting the call to be
torn down after a period of inactivity.
• Data Link Encapsulation is set to Async PPP. This field is not editable.
When you are finished, press Escape.