If you have service at 768 Kbps and no land line then that would mean you’ve got cable. With that, you can get a deal with cable and they bundle services, and you can get a free land line with that. You won’t need a cel phone since you’re not leaving your house any with your 768 Kbps service ... :-) ...
I don’t have cable. I have a modem that gets a signal from a tower. It connects to the computer through the thing-ummy-jig connector—the one they use for DSL. There are four or five such transponders around town.