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Guidelines on cell phone forensics: recommendations of the National Institute of Standards and Technology
Original publisher: Gaithersburg, MD : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology,  OCLC Number: (OCoLC)234309902 Subject: Cell phones. Excerpt: ... Guidelines on Cell Phone Forensics configuration involves three distinct sectors of 120 degree coverage: 0 degree North to 120 degrees...
Original publisher: Gaithersburg, MD : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology,  OCLC Number: (OCoLC)234309902 Subject: Cell phones. Excerpt: ... Guidelines on Cell Phone Forensics configuration involves three distinct sectors of 120 degree coverage: 0 degree North to 120 degrees Southeast, 120 degrees Southeast to 240 degrees Southwest, and 240 degrees Southwest to 360 degrees North. A cell identifier uniquely identifies the BTS and sector involved in servicing a call. Figure 1: Cellular Network Organization The MSC controls a set of BSCs and manages overall communications throughout the cellular network, including interfacing to the public switch telephone network. To perform its tasks, the MSC uses several databases. A key database is the central database for subscriber service information, which is called the Home Location Register ( HLR ). Account information, such as data about the subscriber, the services subscribed to, and the location where last registered with the network are maintained by the HLR and used by the MSC to generate billing records called call data records. The subscriber database and call data records are often an important source of evidence in an investigation. 2.2 Mobile Phone Characteristics Mobile phones are highly mobile communications devices that perform an array of functions ranging from that of a simple digital organizer to that of a low-end personal computer. Designed for mobility, they are compact in size, battery powered, and lightweight. Most cell phones have a basic set of comparable features and capabilities. They house a microprocessor, read only memory ( ROM ), random access memory ( RAM ), a radio module, a digital signal processor, a microphone and speaker, a variety of hardware keys and interfaces, and a liquid crystal display ( LCD ). The operating system ( OS ) of the device is held in ROM, which with the proper tools typically can be erased and repro...
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