Heh-he. In the olden days of 1990, our school's computer-based registration system used DTMF/'Touch-Tone'. When the new registration season started, lots of peo

Heh-he. In the olden days of 1990, our school's computer-based registration system used DTMF/'Touch-Tone'. When the new registration season started, lots of people learned to love their redial button. So many people would be trying to call that the local phone system around the school lost the dial tone, though not service.