|so would I be able to use one of these as a|
That information should be in the manual for that router. If you can't find yours, go to the manufacturer's website and download a copy.
Also, do I need to connect the bridge
to a phone/fax/internet line like my router, or
No, you would bridge with another router that is also capable of operating in "bridge mode". Alternatively, you could plug the new router into the old router with a network cable and set it up to operate as an Access Point.
Just FYI, as you may have figured out from what I've already said, to bridge a wireless network like this, you require two routers both able to operate in bridge mode. You create the bridge between them. So, you need to verify that both of your routers can bridge. If either one can't, then you can't do this and will either have to purchase a new router that can bridge, or wire the second router to the first.