Telephone calling

So yet another blog on a thing you take advantage of every day. The phone originally designed by Alexander Graham Bell has come a long way from its original design. First the telephone could only communicate through a line directly to another phone. The invention of the switch board in 1876 allowed for communication between many groups of phones and thus the telephone network was born the original telephones used a rotary dial to send electrical singles out in a specific sequence to produce a code for the switch board to read. Each single was assigned a number and the telephone number came of this. The modern day design of a phone only became possible after the invention of the chip. Not the potato chip but the microchip. The modern day phone takes many forms however the key principle of a keypad and two speakers still remains the same and thus our phone developed form a tube and dialer to what we know today.