Netopia 3346N-ENT ユーザーガイド

Netopia Firmware Version 8.7 offers line backup functionality in the event of a line failure on the primar y WAN 
link: 

to an internal V.92 modem (suppor ted models) or 

to a backup default gateway. 

This chapter covers the following topics:

The purpose of line backup is to provide a recover y mechanism in the event that the primar y connection fails. A 
failure can be either line loss, for example by central site switch failure or physical cable breakage, or loss of 
end-to-end connectivity. Detection of one of these failures causes the router to switch from using the primar y 
DSL WAN connection to using a built-in V.92 modem. Alternatively, you can choose backup to an alternate 
gateway on the Ethernet LAN. In the event of a loss of primar y connectivity you have the option of switching 
back to the primar y por t automatically once it has recovered its connection.

The following menus suppor t backup configuration:

the Add Connection Profile menus under the WAN Configuration menus

Here you choose Encapsulation Type = PPP, fill out the correct IP Profile Parameters information, select 
Backup as the Interface Group, and fill out the Telco Options. See 

the MODEM (Wan Module 2) Setup menu under the WAN Configuration, WAN (Wide Area Network) 
Setup menus

Here you configure the Internal Modem Setup that governs a number of general behavior settings for the 
internal V.92 modem. See 

.

the Backup Configuration menu under WAN Configuration, Advanced Connection Options

Here you can select Backup is = Automatic, and Recovery is Automatic. See 

.