anna, DSL is not a brand name or the name of your ISP. DSL stands for digital subsriber line and it allows digital communication across a voice connection. The digital data and voice transmission can occur simultaneously, so you can surf and still have your phone. You would still have to have an ISP, just as when you have dial-up, which I assume is what Roadrunner is to you. But since you need a special modem for it and have no need to dial a number to connect, you would know it if you had it.