Reference Guide

9-6 User’s Reference Guide

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.

For an internal V.90 modem or an external modem connected to the Auxiliary port, the Backup Conﬁguration

screen appears as follows (variations for ISDN are described below):

■ Select Backup to Auxiliary Port, Backup to Internal Modem, or Backup to ISDN and press Return. The

system automatically senses whether you have an internal modem or ISDN 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 or ISDN.

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 enter the period of time in minutes 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. The value zero is not permitted.

■ Select Ping Host Name or IP Address and enter an IP address or resolvable DNS name that the router will

ping. This is an optional item that is particularly useful for testing if the remote end of a VPN connection

has gone down. Should this address become unreachable the router will treat this as a loss of connectivity

and begin the backup timer. This loss is a Layer 2 loss.

■ Select Recovery to “WAN_name” (where WAN_name is the type of WAN connection you have, e.g., 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 and enter the period of time in minutes

to determine how long you want the system to wait before the primary WAN connection is well re-estab-

Backup Configuration

Backup Parameters

Backup to Auxiliary Port... Automatic

Requires Failure of (minutes): 1

Ping Host Name or IP Address:

Recovery to ADSL... Automatic

Requires Recovery of (minutes): 1

Auto-Recovery on loss of Layer 2: No

Clear Backup Call only if idle: No

Data Link Encapsulation is Async PPP

Enter Information supplied to you by your telephone company.