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satellite phone servicesAn 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 telephoneIntroductionA touch-tone telephone keypadAn 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 Information. Home sewing supplies beauty salon supplies ladybug party supplies grooming supplies high voltage power supply screen printing supply snoopy party supplies bestec power supply toshiba laptop power supply xerox printer supply art supplies canvas electric power generators microsoft power point training agilent power supply power monitors 3 phase power converter electric gas generator powered laser diode high power pc power quiet supply debt consolidation services online fax service ip phone service residential voip services phone sex services international wireless phone service prepaid home phone service dialup service new car buying service pay per click service london serviced apartment best web site hosting services satellite television services free internet fax services online credit card service dating malaysia online services direct mail and fulfillment services airport limousine service san francisco quality web site hosting service bottled water delivery service online tax filing services boston limo service dating jewish service corporate services |