Firstly, you need to connect your router to a broadband activated phoneline. On the back of your router there is a socket which should say Phone Line and I believe it is at the top.
This will then radiate a radio broadband signal.
Next, you need to be able to link your computer(s) to your router. There are basically four ways of doing this.
1) ETHERNET - You can connect from the ethernet socket on your computer to the ethernet socket on your router. If you have an ethernet socket on your computer, this is the simplest connection but not always the most convenient. If you don't have an ethernet socket on your computer you will not be able to use the yellow cable.
2) USB - You can connect from the USB socket on the router to a USB socket on your computer. You will need to install USB drivers to do this, but it's not difficult.
3) WIRELESS - You can use a Wireless LAN Adaptor. This can either be a card, built in to your computer or an external USB linked wireless adaptor plugged into an available UBS socket on your computer. These are trickier to set up but you have the freedom to connect to the internet from anywhere within radio range of your router and without wires. Some computers have wireless network adaptors built in already, especially laptops. You can find out by doing the following:
Start\Programs\Accessories\Communications\Newtork Connections - check to see if any of the connections say 'wireless' If they do you're in luck.
4) HPNA - You could use a Home PNA Adaptor (HPNA). This allows you to connect to your router from a different room by plugging into a phone socket through through the HPNA. These can be a little unreliable and do suffere sometimes with interference.
As soon as you have connected to the router, you need to connect to the router's Gateway or control panel. This allows you to set a WEP security code for your network and stops your neighbour or anyone else from connecting to your network. If you use a wireless LAN you will have to set this up with your security code.
To prevent hash intereference to your phone, you need to use microfilters on each phone in your house. Usually a couple of filters will be included with your router, and you can easily purchase more, if you have phones all over your house.
Please find the guide for your router at the link below.
You can also download software and drivers from http://www.2wire.com
Just go to the support page and look for your particular model
Hope this helps....