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Start with the router
Not sure why a phone would affect things unless it is VOIP... (Is it?) besides that
Here's some things you can try. I assume you have one computer connected to the modem and it is working. First open a command window (start->run->cmd) and type inconfig /all write down your IP address, gateway and DNS address (usually the same). Now shut down and disconnect the ethernet cable from the modem. The only reason you're writing this IP info down is to make sure you use a different network for your internal router. The router will communicate on the modems network and all your computers will run off your router (not the modem).

Now connect your computer (ethernet) directly to the router (forget the modem for the moment). Do a repair/renew on the network interface (properties on "My NEtwork Places"to see the interface)[or just restart the computer might work]. If the default router settings are working the router should give you an IP address. Right click the network interfact and Check the status - then click on support to see your IP address. Make note of the first 3 quads - probably something like 192.168.0.something. If you get this far then open a browser and try those same 3 quads with either .1 or .254 or .255. One of those should open up the console on the NETGEAR router. Here's where the important stuff is. Go to BASIC SETTINGS. Check off :No login is required. For Internet IP Address check off "Get Dynamically from ISP". Same for DNS. You may have to find out the MAC address of the router and enter it in the next field if the default doesn't work. For the time being leave it alone. click "apply".

Go to the Advanced ->Lan IP Setup section.
You must define a LAN network different from the one that connected you to the modem. If the IP network (First 3 quads) you wrote down when you checked the modem are different than for the router then you don't need to change the network. For LAN IP ADdress you can use 192.168.1.1 with a subnet of 255.255.255.0 (again as long as it's different than the modem address. Forget about RIP. Check off "Use router as DHCP server" and set the starting address with the 3 network quads ending with .2; e.g. 192.168.1.2 and end with .100 (or something less than 255)

NOW go to WAN setup. Check off "Connect automatically as required" . Don't forget to click "apply"after every change you make. Now plug the WAN connection of the router into the LAN input on the modem. Things may work now.

As background the general idea follows: The router dynamically gets it's IP address, dns info etc set automatically by the modem/cable company. This part of the network (considered the WAN to the router) should be a different network than the internal LAN that your computers will connect to. The router in turn provides IP address info, DNS etc to your computers on your local wireless or wired network. The DNS will usually point to the router address because the router will do it's job and route dns requests and everything else once it's working. When you go to connect your computers they will connect through the router, not the modem. So you will be on the router's LAN, - again - not the MODEM's LAN..

As for the wireless stuff choose a wireless network name and set up some kind of security if you like: 64 bit or whatever. Let it choose the key from the selection below. Write it down because you will need it when you try to connect from your wireless PC's.

If the phone is an IP phone with service provided by the cable company you may need a hub to connect both the phone and router to the modem.

That's about it. Hope this helps!

- Bob
Posted by rkorb@...
Updated - 11th Aug 2007