Feb
15
What are * and # keys on a telephone keypad used for?
Filed Under (Technology) by admin on 15-02-2009
Tagged Under : ash key, extra key, star key, telephone key, telephone keypad
In the rotary dial telephone, it took 12 seconds to dial a seven digit number, making it imperative to have a faster dialing rate. In 1950, touch-tone was introduced which uses two frequencies for dialing every number, one from horizontal and one Read the rest of this entry »
