I lived out several years of my youth at 1200 baud. The word "U.S. Robotics" was like porn to me.
Unfortunately, my modem had a sticky phone line relay and so to disconnect the call the procedure was: turn knob, listen for click, thump modem a couple of times just in case, lift phone and check for dial tone.
Pic here, although mine was an even earlier model with a brown case:
http://www.computinghistory.org.uk/userdata/images/large/86/...