Public switched telephone networks
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The public switched telephone network (PSTN) is the concatenation of the world’s public circuit-switched telephone networks, in much the same way that the Internet is the concatenation of the world’s public IP-based packet-switched networks. Originally a network of fixed-line analog … Read More

Mobile phones. Orange or LG Electronics: who fails?
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On August 2010 I bought from Orange Romania SA a mobile phone, LG GT405. First video that I made was with deficiency, but I didn’t use the warranty to repair it.    After one year, the touch screen is blocked, … Read More

Global Positioning System
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Artist’s conception of GPS Block II-F satellite in Earth orbit. The Global Positioning System, usually called GPS, and originally named NAVSTAR, is an intermediate circular orbit (ICO) satellite navigation system used for determining one’s precise location and providing a highly … Read More

Samsung, Blu-ray 3D
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Gama Blu-ray 2011 prezintă funcții precum 3D Playback, One Foot Connectivity, 802.11n Wi-Fi incorporat și un design stilat; modelele remarcabile oferă de asemenea conversie 2D-to-3D   LAS VEGAS, ianuarie, 2011 – Samsung Electronics Co., Ltd. a prezentat în premieră noile … Read More

Communications satellites
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U.S. military WGSS communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications using radio at microwave frequencies. Most communications satellites use geosynchronous orbits or near-geostationary orbits, although some … Read More

History of Artificial Satellites
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Sputnik 1: The first artificial satellite In May, 1946, the Preliminary Design of an Experimental World-Circling Spaceship stated, “A satellite vehicle with appropriate instrumentation can be expected to be one of the most potent scientific tools of the Twentieth Century. … Read More

Smartphones
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Share of 2010 Q1 smartphone shipments by operating system, by Gartner.[1] A smartphone is a mobile phone that offers more advanced computing ability and connectivity than a basic ‘feature phone’.[2] While some feature phones are able to run simple applications … Read More

Mobile phone history
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Mobile car phone, 1964 Mobile phones have existed at least since the 1950s, though the distinction becomes blurry when special systems are used to “patch” conventional Radiotelephones (2-way radio) into a phone network with the assistance of human operators. Modern … Read More

Smartbooks
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Wistron Pursebook, 1GHz Snapdragon ARM CPU (April 2009). A smartbook is a class of mobile device that combines certain features of both a smartphone and netbook.[1][2] Smartbooks deliver features including always on, all-day battery life, 3G and/or WiFi connectivity and … Read More

Invention and history of radio
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Tesla demonstrating wireless transmissions during his high frequency and potential lecture of 1891. After continued research, Tesla presented the fundamentals of radio in 1893. The identity of the original inventor of radio, at the time called wireless telegraphy, is contentious. … Read More

Personal digital assistants
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The Palm TX A personal digital assistant (PDA), also known as a palmtop computer, is a mobile device which functions as a Personal information manager and connects to the internet. The PDA has an electronic visual display enabling it to … Read More

Cordless telephones & Wireless phone systems
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Cisco 7920 Wireless IP Phone Cordless telephones Cordless telephones consist of a base unit that connects to the land-line system and also communicates with remote handsets by low power radio. This permits use of the handset from any location within … Read More

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