local telephone service

An old rotary telephoneA basic modern telephoneThis article is about telephone technology. For the game of telephone, see Telephone (game). For the band, see Téléphone.

The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device which is used to transmit and receive sound (most commonly voice and speech) across distance. Most telephones operate through transmission of electric signals over a complex telephone network which allows almost any phone user to communicate with almost any other.

Touch-tone telephone

Introduction

A touch-tone telephone keypad

An elementary telephone system would consist of three elements:

the equipment located at each subscriber which converts sound to electrical signals and back, and which allows the subscriber to answer or initiate a call,a central switching facility which interconnects all the subscriberswiring or other means to connect the subscriber to the central switching facility.

There are three principal ways a subscriber may be connected to the telephone network:

Historically, and still very commonly, by dedicated physical wire connections run in overhead or underground cables;By radio, as in a cordless, cellular, satellite or radiotelephone andBy voice over internet protocol (VoIP) telephones, which use broadband internet connections. Verizon. Home janitorial supply high voltage power supplies emergency food supply pet training supplies diabetes supply home delivery school furniture supplies power data logger generator onan power cellular phone services cheap phone service limo service cheap web hosting service prepaid legal services online phone service pay per click management services domain hosting service satellite tv services bulk email service digital color printing services cheap wireless phone service dedicated fully hosting managed services prepaid phone services e commerce web hosting services it support services london tree service limousine service los angeles sprint phone service pre employment screening services document storage services customer service training video recruiting services hard drive recovery service telephone answering service equipment visa merchant services delaware incorporation services cleaning services london bankruptcy services phone service houston ambulance billing services local phone service seattle spectrum virtual office services orlando limousine service business dsl service