The Telephone The telephone itself is a rather simple appliance. A microphone, called the transmitter, and an earphone, called the receiver, are contained in the handset. The microphone converts speech into its direct electrical analog, which is transmitted as an electrical signal; the earphone converts received electrical signals back to sound. The switch hook determines whether current flows to the telephone, thereby signaling the central office that the telephone is in use. The ringer responds to a signal sent by the central office that causes the telephone to ri....

Words In Essay: 334 Approximate Pages: 2

You are just minutes away from instant access to viewing this paper along with over 35,000 other essays and term papers. What are you waiting for? That paper isn't going to write itself. Join today and get a ton of help with that paper! Membership Options Price Recurring 1 month  subscription $17.95 Y 3 months subscription $34.95 Y 6 months subscription $59.95 N