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GMRS (General Mobile Radio Service) - A long-range, 2-way radio service designated for recreation and other non-business applications. Due to the extended range of GMRS, FCC licensing is required. GMRS uses Ultra High Frequency (UHF) bands between 462 and 469 MHz.
GMS This is an international standard for digital cell phone communication. Originated in Europe, the initials originally stood for Groupe Spéciale Mobile, but now represent Global System for Mobile Communications. Having such a standard ensures compatibility, so one can use the same cell phone for travel between countries. Today more than 105 countries, including the United States and Japan, have existing or planned GSM networks. These networks account for a large percentage of the world's cellular market.
GSM (Global System for Mobile Communication) - GSM is the most widely used mobile telecommunications standard in the world. A form of Time Division Multiple Access (TDMA) multiplexing, GSM is the standard in Europe and Asia.
Gateway Hardware, software or a combination of the two that acts as an entry point to a network. Gateway servers are also commonly used as firewall servers that guard against the entry of unauthorized users to a private network. In the client/server model, there is a gateway at the entry to both end points.
Gigabit (Gb) - 1) In terms of data transfer, one gigabit per second (Gbps) refers to 1,000,000,000 bits of information transferred per second. 2) In relation to data storage, one gigabit is exactly equal to 1,073,741,824 bits of stored data.
Gigahertz (GHz) - 1) In radio frequency (RF) transmissions, GHz is used to describe 1,000,000,000 cycles per second, or Hertz. 2) In computing contexts, GHz describes 1,000,000,000 oscillations per second of the computer’s processor.
 
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