Wireless setup question

Before I spend money on new hardware I want to run this question by somebody to make sure what I am planning will work.  I have an existing home wi-fi setup using an Actiontec DSL router/modem with built in wireless.  But I have large home and the coverage is not good.  What I want to do it use an existing cat-5 line that runs from where the router is to the other end of the house, where I will connect it to a new 802.11n wireless access point.  I am already using existing cat-5 cables in the house to create wired connections for a couple machines so I know the cable should be good.  Does this sound do-able?  I am correct that I need to buy an "access point" *not* a router to do this?  Will I have to turn off the wireless on the original router or can they both co-exist?  Any other advice/suggestions?
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Sounds very do-able. Good planning. An access point is what you are after for this kind of set up. You won't have to turn off the existing wireless as they can co-exist. I do suggest you keep them at least 3 channels apart when you do set them up so there is little interference.

Will you be using the AP as a bridge or as a seperate wireless 'domain'.

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No, the wireless on the new AP and the router may remain on to increase your coverage. You will as AlienVoice suggests, separate the channels. This is done in the web interface of the AP and the router.
I would also strong recommend that you make sure that both are supporting the same WPA security.
jmckay321Author Commented:
I don't know how to answer the question about using the AP as a bridge or separate domain - what do those terms mean, and why would I choose one over the other?
Basically bridging 2 wireless APS is where the APs talk to each other and allow you to walk from one end of the house to the other without losing wireless connection.

But the simpilest method is to have them both act as seperate gateways to begin with and when your comfortable with wifi techology, bridge them later.

Below is a basic outline of different AP modes, including bridging.

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