With the FWG114P, you dont need to install the modem on your computer. All you have to do is to connect your External Serial modem to the FWG114P, go to the router setup page, look under the Auto-rollover section, input your dial-up account information. Select the correct modem model on the modem page section for the FWG114P. I believe your model is not listed on the modem page so you can try using the Standard 56000 modem. Uninstall the modem driver from your computer as you dont need it and change the internet connection setting to use "Never dial Connection". You should hear the modem dial out when you try to connect to the internet. Review the installation guide for more detail.
http://kbserver.netgear.com/products/fwg114p.asp
Albert
Can't get DSL so I bought a wireless Router with dial-up back-up (Netgear FWG114P) and an external serial modem from ebay (Diamond SupraExpress 56e). I run XP on the computer that is Ethernet wired to the router. I didn't know how to install the modem (through the router) and ended up telling XP to install it on "all ports". The installation was successful, though the modem shows its location as "unknown" in device manager. When I select that modem as the default and try to connect to the internet I get a modem hardware error. I didn't use the automatic setup for the router since that was geared for the DSL/Cable modem user. I did set up the Automatic Rollover section to get the router to try connecting via dial-up. I noticed that the modem was a European version. It doesn't seem to be supported by Diamond any more, so I'm not sure what to try next. Thanks, Nick.

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