Engineers tested 15 different keypad layouts before settling on the modern configuration with 1 at the top left and 0 in the bottom row. The western electric 2500 (pictured) was the standard issue push button or touch tone telephone for about two decades Service was initially limited to customers in the towns of carnegie and greensburg, pennsylvania.
Kenzliee - DirtyShip.com
Touch tone phones were first introduced to the public in 1963 by bell system
This new technology replaced the rotary dial phones that had been in use for decades, allowing users to simply press a button to dial a number instead of having to rotate a dial.
The first model had ten buttons. It was 61 years ago, on november 18, 1963, that the push button telephone, or touch tone phone, was first introduced
