Telephones

1. By: Diamond Thomas Telephones

2. The First Telephone 1876 • The First Telephone was invented March 10, 1876 by Alexander Graham Bell. The First Telephone

3. . 1919 . • 1919 Bell System Companies installed a rotary device ( the finger wheel) Rotary Device

4. 1947-1963 . • In 1947 AT&T and Bell companies developed a system that assigned number • 1963 the telephone had 10 keys later 12 when the * and # came along. Buttons

5. . 1973 • In 1973 Martin Cooper created the first Cell Phone • First portable cell phone is call made Cell Phone

6. 1983 • Cordless phone Came out. CORD less phone

7. 1995 • Caller Id Became world wide in the United States • First prototype of caller id was installed 1971 Caller id

8. Handset Cell phones All types

9. The telephone was invented on March 10, 1876 by Alexander Graham Bell. Alexander Graham Bell made the first phone call to his assistant Thomas Watson. Alexander assistant was in the next room when he tested his experiment. In 1919 the Bell System companies installed a rotary dial (the finger wheel of the dial). This phone was out when mostly everyone had phones. 1947 The North America number plan began. Telephone customers were growing rapidly so AT&T and the bell companies develop a system that assigned telephone numbers to customers. 1963 the telephone had 10 buttons to replace rotary device. Then 12 with the # and * button By 1971 Motorola made the first portable cell phones were made and the first prototype of caller id was installed. 1995 caller id became world wide telephones have changed a lot over the years from beeps and taps to words Bibliography