SIEMENS 5881 Broadband Internet Router
User’s Guide
Chapter 5 Advanced Setup
Dial Backup
SIEMENS
43
Dial Backup
Dial Backup provides a backup to the Internet through an asynchronous modem connection when the default
WAN link service experiences interruption. The modem connection can be provided through either an internal
V.90 modem or an external V.90 or ISDN modem connected to the MGMT Console port.
Dial Backup is intended for customers with critical applications for which continuous Internet access is vital. If
the WAN link for those applications goes down, the router automatically switches traffic to the specified
asynchronous modem. Once the WAN link is up and stable, the router automatically switches the modem
traffic back to the WAN.
Use the Dial Backup option to configure a backup connection to the Internet through an external asynchronous
modem connected to the console port. This backup connection can be activated in the event of WAN service
interruption. During an interruption to the WAN interface connection, the router will use the dial backup modem
connection while waiting for WAN service to be restored. Once the WAN link is active again, Dial Backup will
automatically switch back to the WAN service. (This feature may also be useful for a customer whose WAN
connection is not yet installed. The router begins providing service through an asynchronous modem and then
automatically switches to the WAN when it becomes available.)
To configure a dial backup connection:
1. Click
Dial Backup
on the left navigation pane of the Router Information page. This displays the Dial Backup
page.
2. Click
Enable Dial Backup
.
3. Enter the
User name
and
Password
to use for the dial up connection. This information is provided by your
ISP.
4. In
Phone number
, enter the ISP’s dial up phone number.
5. Optionally, in
Alternate Phone number
, enter an alternate phone number to use in the event the first
number is unavailable.
6. Click
Apply
.
