GSM is the short form for Global System for Mobile Communications. It is quite popular communication protocol and used in many places around the world. Let's take a deeper look at this standard.
GSM is a standard used by cell phones for communication purposes. It is a competitor to the CDMA protocol and is also considered by many as a protocol that is superior to CDMA because of its features. This protocol is a part of emerging wireless mobile telecommunications technologies, such as Enhanced Data rate for GSM Evolution (EDGE), High-Speed Circuit-Switched Data (HSCSD), and Universal Mobile Telecommunications Service (UMTS). It has more than one billion users worldwide and is currently used in more than 212 countries.
There is a difference between GSM and its predecessors. Both its signal and speech channels are in digital form and in this context it falls under the category of 2G mobile phone system.
The operational frequencies for GSM lie between 1.9 GHz and 850 MHz. This is the GSM frequency range that is used by mobile phones in the United States. In Australia, GSM used the 850MHz and in Europe the GSM range is between 900 MHz and 1.8 GHZ.
The GSM protocol makes use of SIM cards in which all personal data is stored. If you were to change your mobile phone all that is required is to change the card to make use of existing personal and contact information in the new mobile phone. This is a feature that is offered only by GSM and it is also the reason why this protocol is preferred over CDMA.
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Orignal From: GSM: The Most Popular Communication Protocol
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