ZyXEL Communications PRESTIGE 128MH - Manual (Page 71)

Prestige 128MH PSTN Router/Hub
Internet Access 3-15
Step 4. In Menu 11.3, set the remote node's subnet mask to [0.0.0.0], and set RIP to [None].
Step 5. Save the new configuration.
Please note that the remote IP address of 1.1.1.1 is only a placeholder to avoid conflicting with
that of the primary ISP, which is implicitly set at 0.0.0.0. When the backup ISP is activated, the
remote IP address of 1.1.1.1 combined with the subnet mask of 0.0.0.0 creates a default route that
is equivalent to the one derived form the primary ISP.
3.6.2 To Switch ISP
Follow these steps when you need to switch from your primary ISP to a backup ISP:
Step 1. Enter Menu 11 and select your Primary ISP.
Step 2. In Menu 11.1, set the Active field to [No].
Step 3. Enter Menu 11 again and select your Backup ISP.
Step 4. In Menu 11.1, set the Active field to [Yes].
You will now be able to access the Internet through the backup ISP Remote Node.
3.7 Editing Login Script
Some ISPs requires text login before it starts PPP negotiation. If this is the case for your ISP,
please refer to section 4.1.6 Editing Login Script on how to create a login script.