I had a seperate line, too.  Locally I pay per call, so if it stayed up for 200 hours, it was still the same nickel a one-minute call was.  Back when SBC showed local minutes of useage it was funny to see 10 calls, 30,000 minutes of  useage- totalling forty-some cents.  Got a little more expensive when my provider began to kick me off after twelve hours online.