satellite phone 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. Satellite Phone Service Plan. Home teacher supplies uninterruptible power supplies disney party supplies waterbed supplies drafting supply office supply wholesale balloon supplies supply chain management degree vinyl siding supplies industrial packaging supply dewalt power tools high power diode lasers printer power supplies gateway computer power supply cat power drywall power sander the protein power diet cheap hosting services carpet cleaning service fast internet service black dating services bulk email services cingular cell phone service web hosting service providers long distance phone services san diego dating service web services design paper shredding services web site services local phone service atlanta limousine services in los angeles satellite telephone service chicago limo service direct tv service aircraft charter services consumer credit repair service dallas virtual office services aol internet phone service online matchmaking service general business service small business telephone service computer service new york elder services