DSL is short for Digital Subscriber Line. Depending on who you talk to, people have been able to achieve speeds of 500k to 10 mebabits. Not bad for copper. If your ISP supports DSL, you will need to use the same company's modems for your side. Also, to use DSL, you must be within 18,000 feet of a phone company switch.
Signal degradation kills it after that.
Look for DSL to replace ISDN in the near future. And no, I do not have any projected prices for the service and don't know exactly when it will be available in the Panhandle. So, you're thinking about putting a banner ad on a website for your business. Check out my site of the night, Autobytel . Simply tell them what type of car you want to buy and they send out requests to hundreds of U.S. dealers.