The cable modem will be able to plug into an existing outlet. If you still want to use that outlet for TV, then you'd just use a splitter like you normally would to get an extra outlet.

The internet connection comes down a few bandwidth slots designated for data. Each channel has a slot; they just assign one or two for Internet traffic and tell the cable modem. There's another special channel used for upstream data. So, no extra cable from the street. :-) Due to cable TV being a largely "one-to-many" system, one thing that needs to be checked is that at each repeater and head-end the doohickeys are in place for the upstream traffic to flow. That activity would come under "line conditioning".

Wade.