Resolved Bypass the DSL Modem?

I'm on EarthLink dial-up, looking into Qwest's DSL. I'm told the phone line will go into the modem and onward to the CPU. For whatever reason, can I unplug the phone line, bypass the modem and plug into the CPU for dial-up? As long as I still have service with EarthLink. Think of it as a car's spare tire, for when the modem goes bad. (Of course, I could just wait and find out. But I want a clue in advance.)

 

Thanks, guys. Your replies are what I expected, but I wanted advance input. Now I'm about to take the plunge. I hope I won't become one of the many people who have horror stories about poor service from Qwest. EarthLink service was good, but I couldn't get answers about upgrading from those CSRs overseas.