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GMRS radios are typically handheld portable (walkie-talkies) much like Family Radio Service (FRS) radios, and they share a frequency band with FRS near 462 and 467 MHz. Mobile and base station-style radios are available as well, but these are normally commercial UHF radios as often used in the public service and commercial land mobile bands ...
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Low-level systems are used for areas as large as an entire city, or as small as a single building. "High-level" repeaters are placed on tall towers or mountaintops to maximize their area of coverage. With these systems, users with low-powered radios (such as hand-held "walkie-talkies") can communicate with each other over many miles.
Motorola T5320 FRS handheld radio. The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band.
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In many areas of the US, other channels have been used in the past for similar purposes including 10, 17, and 21. [9] Channel 13 has been used in some areas for marine use [8] and for recreational vehicles. [9] Channel 9 is reserved by regulation [3] for emergency use and to provide traveler assistance. In decades past, the channel was ...
Besides personal use, the equipment is used by search and rescue organizations, businesses, security guards, taxi companies and delivery services. In urban areas, simplex repeaters, usually mounted on the roofs of high-rise buildings, are used to increase communication range. CTCSS and DCS are often used due to heavy channel congestion in urban ...
Land mobile radio systems are widely used by the military. Separate bands in the radio spectrum are reserved for their use. This includes portions of the 30-50 MHz band, and the entire 100-100, 100-100.8, and 540-2400 MHz bands, plus shared use of the 170- 170 MHz band.
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