Difference between pages "EncaseHashFiles" and "Global System for Mobile Communications"
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| − | + | The '''Global Systems for Mobile Communications''' ('''GSM'''), is a radio-based technology that allows [[mobile phones]] to communicate. GSM is considered to be the world's most ubiquitous radio-based cellular technology, with 1.7 billion users as of March 2006. In the United States, carriers such as [[T-Mobile]] and [[Cingular]] utilize GSM technology for their cellular networks. | |
| + | |||
| + | = GSM Cell Phone Providers = | ||
| + | |||
| + | == USA == | ||
| + | |||
| + | * [[Cingular]] | ||
| + | * [[T-Mobile]] | ||
| + | |||
| + | == Other == | ||
| + | |||
| + | * [[T-Mobile]] | ||
| + | * [[Vodafone]] | ||
| + | * [[O2]] | ||
| + | |||
| + | = Operational Characteristics = | ||
| + | |||
| + | == Network Principles == | ||
| + | |||
| + | GSM is considered to be 2G and uses digital data for both signaling and voice purposes. GSM uses a time division multiple access ([[TDMA]]) protocol to transmit information. Aside from voice, [[GPRS]] and [[EDGE]] allow for data transmissions across a GSM network. | ||
| + | |||
| + | == Radio Communication == | ||
| + | |||
| + | In terms of frequencies used, GSM networks often use the 900MHz and 1800MHz bands, but carriers in the United States use 850MHz and 1900MHz bands. As a result, "dual-band" phones, which only support two of the four major bands, can only be used in certain parts of the world. More common are "tri-band" phones, which usually operate on 900/1800MHz and 1900MHz. "Quad-band" phones support all four frequencies and can be used in all parts of the world. | ||
| + | |||
| + | == Security and Encryption == | ||
| + | |||
| + | * [[SIM Card]] | ||
| + | * [[Security Standards]] | ||
| + | * [[Authentication Standards]] | ||
| + | |||
| + | = GSM Forensics = | ||
| + | |||
| + | * [[Phone with SIM Card]] | ||
| + | * [[Phone without SIM Card]] | ||
| + | * [[SIM Card]] | ||
| + | |||
| + | == External Links == | ||
| + | |||
| + | * [http://www.gsmworld.com/index.shtml GSM World] | ||
Revision as of 21:56, 19 April 2006
The Global Systems for Mobile Communications (GSM), is a radio-based technology that allows mobile phones to communicate. GSM is considered to be the world's most ubiquitous radio-based cellular technology, with 1.7 billion users as of March 2006. In the United States, carriers such as T-Mobile and Cingular utilize GSM technology for their cellular networks.
Contents |
GSM Cell Phone Providers
USA
Other
Operational Characteristics
Network Principles
GSM is considered to be 2G and uses digital data for both signaling and voice purposes. GSM uses a time division multiple access (TDMA) protocol to transmit information. Aside from voice, GPRS and EDGE allow for data transmissions across a GSM network.
Radio Communication
In terms of frequencies used, GSM networks often use the 900MHz and 1800MHz bands, but carriers in the United States use 850MHz and 1900MHz bands. As a result, "dual-band" phones, which only support two of the four major bands, can only be used in certain parts of the world. More common are "tri-band" phones, which usually operate on 900/1800MHz and 1900MHz. "Quad-band" phones support all four frequencies and can be used in all parts of the world.
