Telephone
hideThe telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.
The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.
For more information about Telephone, read the full article at
Wikipedia.
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News tagged with phone
Cisco and British Telecom head for the 'cloud'
3 hours ago |
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Cisco and British telecom giant BT Group on Wednesday announced a partnership aimed at a growing hunger by businesses worldwide for Internet-based communications services.
GSM system about to be compromised
Dec 08, 2009 |
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(PhysOrg.com) -- Research scientists in California and elsewhere are deliberately setting out to compromise the mobile phone system used by around three billion people. The system uses Global System for Mobile ...
Google search getting eyes and ears
Dec 08, 2009 |
5 / 5 (2) |
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Google search is getting eyes and ears, moving beyond typed key words to let people scour the Internet with mobile telephone cameras or spoken words in multiple languages.
Texas Instruments raises 4Q profit, sales targets
Dec 08, 2009 |
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(AP) -- Texas Instruments is raising its fourth-quarter profit and sales outlook, citing an improving market for chips used in cell phones and other electronic gadgets.
Researchers create cell phones for sign language
Dec 02, 2009 |
4.6 / 5 (7) |
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(PhysOrg.com) -- Cornell researchers and colleagues have created cell phones that allow deaf people to communicate in sign language, the same way hearing people use phones to talk.
NIST develops experimental validation tool for cell phone forensics
Dec 02, 2009 |
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Viewers of TV dramas don't focus on the technology behind how a forensics crime team tracks a terrorist or drug ring using cell phone data, but scientists at the National Institute of Standards and Technology do. NIST researchers ...
Gifts for your favorite geek
Electronics / Consumer & Gadgets
Dec 04, 2009 |
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In the spirit of the season, I've picked out 10 geeky gifts that cost less than $100. Some are practical. Some are fun. All would be good additions to your gift list for friends and family -- or your own wish list. (Ranked ...
No change in brain tumor incidence during a time when cell phone usage increased
Dec 03, 2009 |
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There was no substantial change in brain tumor incidence among adults 5 to 10 years after cell phone usage sharply increased, according to a new brief communication published online December 3 in the Journal of the National Ca ...
