Professional mobile radio (also known as private mobile radio (PMR) in the UK and land mobile radio (LMR) in North America) are field radio communications systems which use portable, mobile, base station, and dispatch console radios. Operation of PMR radio equipment is based on such standards as MPT-1327, TETRA and APCO 25 which are designed for dedicated use by specific organizations, or standards such as NXDN intended for general commercial use. Typical examples are the radio systems used by police forces and fire brigades. Key features of professional mobile radio systems can include:
- Point to multi-point communications (as opposed to cell phones which are point to point communications)
- Push-to-talk, release to listen — a single button press opens communication on a radio frequency channel
- Large coverage areas
- Closed user groups
- Use of VHF or UHF frequency bands
Read more about Professional Mobile Radio: Introduction, Selective Calling, Modulation, TETRA Private Mobile Radio (PMR), PMR Trunking Using MPT1327
Famous quotes containing the words professional, mobile and/or radio:
“Never be intimidated when you deal with men. Curse, don’t cry.”
—Anonymous, U.S. professional woman. As quoted in Aspirations and Mentoring in an Academic Environment, ch. 4, by Mary Niles Maack and Joanne Passet (1994)
“From three to six months, most babies have settled down enough to be fun but aren’t mobile enough to be getting into trouble. This is the time to pay some attention to your relationship again. Otherwise, you may spend the entire postpartum year thinking you married the wrong person and overlooking the obvious—that parenthood can create rough spots even in the smoothest marriage.”
—Anne Cassidy (20th century)
“All radio is dead. Which means that these tape recordings I’m making are for the sake of future history. If any.”
—Barré Lyndon (1896–1972)