In the 1870s, two inventors Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech electrically (the telephone). Both men rushed their respective designs to the patent office within hours of each other, Alexander Graham Bell patented his telephone first. Elisha Gray and Alexander Graham Bell entered into a famous legal bat.. Read More..
Martin Cooper entered the history books on April 3, 1973 when he placed the first public telephone call on a portable cellular device. He called his competitors at AT&T's Bell Labs to give them the news of his cell phone invention.To make the call even more exciting, he phoned them from the streets of New York City.Cooper made several calls that day, one to a radi.. Read More..
A payphone is typically a coin-operated public telephone, often located in a telephone booth or a privacy hood, with pre-payment by inserting money (usually coins) or by billing a credit or debit card, or a telephone card. Prepaid calling cards also facilitate establishing a call by first calling the provided Toll-free telephone number, entering the card account numbe.. Read More..
A walkie-talkie is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald L. Hings, radio engineer Alfred J. Gross, and engineering teams at Motorola. Al Gross a Canadian who moved to the U.S. is also given credit by MIT for inventing the first Walkie-Talkie. In 1976 the U.S. government decl.. Read More..
A pager (also known as a beeper) is a wireless telecommunications device that receives and displays numeric or/and receives and announces voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter.Pagers operate as part of a paging system which .. Read More..
The phonograph was invented in 1877 by Thomas Edison.While other inventors had produced devices that could record sounds, Edison's phonograph was the first to be able to reproduce the recorded sound. His phonograph originally recorded sound onto a tinfoil sheet phonograph cylinder, and could both record and reproduce sounds. Alexander Graham Bell's Volta Labor.. Read More..
A microphone is a device for converting acoustic power into electric power that has essentially similar wave characteristics. Microphones convert sound waves into electrical voltages that are eventually converted back into sound waves through speakers. They were first used with early telephones and then radio transmitters.In 1827, Sir Charles Wheatstone was the first .. Read More..
iPhone is a line of smartphones designed and marketed by Apple Inc. They run Apple's iOS mobile operating system.The first generation iPhone was released on June 29, 2007; the most recent iPhone models are the iPhone 6 and iPhone 6 Plus, which were unveiled at a special event on September 9, 2014.The iPhone created such a sensation that a survey indicated six out .. Read More..
Joost was an Internet TV service, created by Niklas Zennstrom and Janus Friis (founders of Skype and Kazaa). During 2007-2008 Joost used peer-to-peer TV (P2PTV) technology to distribute content to their Mozilla-based desktop player; in late 2008 this was migrated to use a Flash-based Web player instead.Joost began development in 2006. Working under the code name "The .. Read More..
Rdio is an online music service that offers ad-supported free streaming and ad-free subscription streaming services in 85 countries.It is available as a website and also has applications for iPhone, iPod Touch, iPad, Android, BlackBerry, and Windows Phone mobile devices, which can stream music from its servers or download music for offline playback.There are also clie.. Read More..
YouTube was invented by Steve Chen, Chad Hurley and Jawed Karim out of a garage in Menlo Park. The inventors became millionaires when they sold their invention for 1.65 billion dollars to the search engine Google.According to their fact sheet, YouTube was founded in February 2005, as a destination to watch and share original videos worldwide through the Web. Users can.. Read More..
In telecommunications, direct-sequence spread spectrum (DSSS) is a spread spectrum modulation technique. Spread spectrum systems are such that they transmit the message bearing signals using a bandwidth that is in excess of the bandwidth that is actually needed by the message signal. This spreading of the transmitted signal over a large bandwidth make the resulting wi.. Read More..
Years before the format war between VHS and Betamax,and decades before DVDs came onto the scene,there was film.But film was hard to use and eventually videotape was invented.It was much faster to edit than film and speeded up the news business.But these first video machines were so big that they were stationary,and the roving reporters of the world stuck to film until.. Read More..
DSL (Digital Subscriber Line) is a technology for bringing high- bandwidth information to homes and small businesses over ordinary copper telephone lines. xDSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL. Assuming your home or small business is close enough to a telephone company central office that offers DSL service, you may be able to recei.. Read More..