Linksys Wireless Phone Adapters

Hi

I have a quick question, not sure if anyone can help?

with the Linksys WBP54G Wireless-G Bridge for Phone Adapters - do these just plug into the desktop phones and then work wireless with your broand router?

Do I need a special router in order to work with this product? I am currently using a BT Home Hub router and wondered if it would still work with this product?

I am after using a desktop phone without the hassle of wires as my router is in the hallway downstairs and I want to use the phone upstairs, so cannot trail the wires everywhere.

Any help would be appreciated.

Thanks
Lisalou