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Project 25 (also known as P25) is a suite of digital radio communications standards designed specifically for law enforcement, fire, and medical services to communicate with each other during emergencies. [2] ASTRO 25 is now the most widely used P25 mission-critical voice and data communication network in the world. [3]
Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...
BusRadio was an American company established in 2004, with the goal of providing several services to school buses, their drivers and passengers. It was envisioned that the service would transmit music, original programming, public service announcements (PSAs) and paid commercials to school children travelling on school buses in selected school districts.
Jun. 12—Communication is critical for the various agencies in a city and county that work to maintain public safety, especially for first responders. However, sometimes inter-department ...
The frequency range used by most early radio systems, 25–50 MHz (vhf "low band") is particularly susceptible to the problem of electrical noise. This plus the need for more channels led to the eventual expansion of two-way radio communications into the VHF "high band" (150–174 MHz) and UHF (450–470 MHz).
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
Professional mobile radio (also known as private mobile radio (PMR) in the UK) are person-to-person two-way radio voice communications systems which use portable, mobile, base station, and dispatch console radios.
There are two types of radio network currently in use around the world: the one-to-many (simplex communication) broadcast network commonly used for public information and mass-media entertainment, and the two-way radio (duplex communication) type used more commonly for public safety and public services such as police, fire, taxicabs, and delivery services.