Netopia R6100 Reference Manual page 89

The router senses what type of WAN interface modules are installed in the WAN interface slots. For example, if
you have an ISDN daughter card installed in slot 2, the screen will say ISDN (Wan Module 2) Setup....
Choose the interface you want to configure for backup, either Motherboard Auxiliary Setup... or (Wan Module
2) Setup....
If you select Motherboard Auxiliary Setup..., the following screen appears:
Aux Serial Port...
Data Rate (kbps)...
Aux Modem Init String:
Aux Modem Directory Number:
Options for the Aux Serial Port are Async Modem or Unused.
If you select Async Modem, you can select its Data Rate from a pop-up menu, edit the Aux Modem
Init String, if necessary, and enter the Aux Modem Directory Number to dial to connect to your ISP.
Press Escape twice to return to the WAN Configuration screen, and select Backup Configuration
(shown on page
Auxiliary Port Configuration
9-6).
Async Modem
57.6
AT&F&C1&D2E0S0=1
Dial Backup 9-3