The base monthly cost of a phone here in Texas (I've pared off every extraneous service I can) is around $22 a month. DSL is anywhere from $40 to $50. If you have a second line in, you're paying about $44, if you have one line and DSL you're paying $62 to $72 a month. So the second line is a savings between the two, but even a dedicated phone line to the computer runs a lot slower than a DSL line.