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|UMTS||Rugged Tablet PC|
|Universal Mobile Telecommunications System is one of the third-generation (3G) mobile telecommunications technologies, which is also being developed into a 4G technology. Currently, the most common form of UMTS uses W-CDMA as the underlying air interface. UMTS and its use of W-CDMA is standardized by the 3GPP, and is the European answer to the ITU IMT-2000 requirements for 3G cellular radio systems.
To differentiate UMTS from competing network technologies, UMTS is sometimes marketed as 3GSM, emphasizing the combination of the 3G nature of the technology and the GSM standard which it was designed to succeed.
|GPS , GPRS|
|UXGA(Ultra eXtended Graphics Array) refers to a standard monitor resolution of 1600x1200 pixels, which is exactly double the default resolution of SVGA (800x600). UXGA has been the native resolution of many fullscreen monitors of 15" or more.|
|A USB (Universal Serial Bus) system has an asymmetric design, consisting of a host, a multitude of downstream USB ports, and multiple peripheral devices connected in a tiered-star topology. Additional USB hubs may be included in the tiers, allowing branching into a tree structure with up to five tier levels. A USB host may have multiple host controllers and each host controller may provide one or more USB ports. Up to 127 devices, including hub devices if present, may be connected to a single host controller.
USB devices are linked in series through hubs. There always exists one hub known as the root hub, which is built into the host controller. So-called sharing hubs, which allow multiple computers to access the same peripheral device(s), also exist and work by switching access between PCs, either automatically or manually. Sharing hubs are popular in small-office environments. In network terms, they converge rather than diverge branches.
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