Справочное Руководство для Netopia r6100

The router senses what type of WAN inter face modules are installed in the WAN inter face 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 inter face you want to configure for backup, either Motherboard Auxiliary Setup... or (Wan Module 
2) Setup....

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If you select Motherboard Auxiliary Setup..., the following screen appears:

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Options for the Aux Serial Port are Async Modem or Unused.

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If you select Async Modem, you can select its Data Rate from a pop-up menu, edit the Aux Modem 
Init String, if necessar y, and enter the Aux Modem Directory Number to dial to connect to your ISP.

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Press Escape twice to return to the WAN Configuration screen, and select Backup Configuration 
(shown on 

                         Auxiliary Port Configuration

         Aux Serial Port...                 Async Modem
         Data Rate (kbps)...                57.6
         Aux Modem Init String:             AT&F&C1&D2E0S0=1
         Aux Modem Directory Number: