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Line Backup 9-3
Backup Configuration screen
This screen is used to configure the conditions under which backup will occur, if it will recover, and how the
auxiliary port is configured. The circuit type is Switched Asynchronous.
■ Select Backup to Auxiliary Port or Backup to Internal Modem and press Return. The system automatically
senses whether you have an internal modem card installed in the second slot. If you do not, this menu
item will be Auxiliary Port; if you do, this item will be Internal Modem. A pop-up menu allows you to select
Disabled, Manual, or Automatic. You enable line backup by selecting either Manual or Automatic. If you
enable backup, the subsequent menu items become visible.
■ Select Requires Data Link Failure of... and press Return. A pop-up menu allows you to choose among
30s(econds), 1m(inute), 2m, 5m, 10m, or 15m to determine how long you want the system to wait before
the backup port becomes enabled in the event of primary line failure. This allows you to be sure that the
primary WAN connection is not merely briefly interrupted before the router switches to backup mode.
■ Select Ping Host Name or IP Address and enter an IP address or resolvable DNS name that the router will
ping. Should this address become unreachable the router will treat this as a loss of connectivity and begin
the backup timer.
■ Select Recovery to “WAN_name” (where WAN_name is the type of WAN connection you have, e.g., SDSL)
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... and press Return. A pop-up menu
allows you to choose among 30s(econds), 1m(inute), 2m, 5m, 10m, or 15m. 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.
■ You can toggle Recovery on loss of Layer 2 to Yes or No (the default). This setting determines whether
Backup Configuration
Backup Parameters:
Backup to Auxiliary Port... Automatic
Requires Data Link Failure of... 30 Sec
Ping Host Name or IP Address:
Recovery to DLC SDSL... Manual
Auxiliary Port Setup:
Data Rate (kbps)... 57.6
Modem Initialization String: AT&F&C1&D2E0S0=1
Modem Dialing Prefix: ATDT
Data Link Encapsulation is Async PPP
Enter Information supplied to you by your telephone company.