Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
I'm a youngster, but I remember not being able to get a hold of people who used their only phone line for dial-up. We would get on the internet and do whatever we needed then get off as fast as we could so we could receive calls. Later we got a second phone line so it was less of a hassle. Now, I leave the net on all day! We recently got cable modem internet a year and a half ago. Boy was that a huge step up!
My first use of dial up was with the same type of handset cradle and a teletype running at 75 baud. We then progressed to a crt display, the DEC VT100 ( http://en.wikipedia.org/wiki/VT100 )
George