Thanks, I'm not entirely clear what the Sagecom is. Is that the FibeTV box?
It looks like the WES-610 is the same but with four wired ports. And there's a Range Extender RE-1000 that seems to serve the same function ("one ethernet port to act as a bridge").
It sounds like a "bridge" is what I'm looking for. I have a Cisco 2500 router (not on the Bell network) that I rather like so these are a good place to start.