Land Mobile Radio System (LMRS) is a term that denotes a wireless communications system(s) intended for use by terrestrial users in vehicles (mobiles) or on foot (portables). Such systems are used by emergency first responder organizations, public works organizations, or companies with large vehicle fleets or numerous field staff. Such a system can be independent, but often can be connected to other fixed systems such as the public switched telephone network (PSTN) or cellular networks. Also called Public Land Mobile Radio or Private Land Mobile Radio.

The Land Mobile Radio System is also the United States Department of Defense

United States Department of Defense

The United States Department of Defense is the U.S...

's new state-of-the-art communication system. Government contractors, such as Cassidian Communications,Relm Wireless Corporation, Harris Corporation

Harris Corporation

Harris Corporation is a Florida-based international communications equipment company that produces wireless equipment, electronic systems, and both terrestrial and spaceborne antennas for use in the government, defense, and commercial sectors. It is also the largest private-sector employer in...

, Motorola

Motorola

Motorola, Inc. was an American multinational telecommunications company based in Schaumburg, Illinois, which was eventually divided into two independent public companies, Motorola Mobility and Motorola Solutions on January 4, 2011, after losing $4.3 billion from 2007 to 2009...

, Raytheon

Raytheon

Raytheon Company is a major American defense contractor and industrial corporation with core manufacturing concentrations in weapons and military and commercial electronics. It was previously involved in corporate and special-mission aircraft until early 2007...

, Thales

Thales

Thales of Miletus was a pre-Socratic Greek philosopher from Miletus in Asia Minor, and one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition...

, and Tyco Electronics

Tyco Electronics

TE Connectivity, Ltd., previously known as Tyco Electronics, Ltd., and formerly a segment of Tyco International, is a leading global provider of engineered electronic components, network solutions, undersea telecommunication systems, and specialty products for customers in more than 150 countries...

, provide the latest in LMRS technology to the government and military.

In November 2005, many automatic garage doors in Ottawa, Canada, have
suddenly, http://www.cbc.ca/ottawa/story/ot-garageopen20051104.html and strangely,
stopped working, due to a powerful radio signal that appears to be interfering with the remote
controls that open them. http://www.cbc.ca/ottawa/story/ot-signal200511.html

In the Summer of 2004, Garage door operators noticed similar phenomena around U.S. military bases. The strong radio signals on the 390-megahertz band simply overpower the garage door openers.
One technician likened it to a whisper competing with a yell.http://www.signonsandiego.com/uniontrib/20051208/news_lz1n8readthis.html

-- Government Accountability Office

Government Accountability Office

The Government Accountability Office is the audit, evaluation, and investigative arm of the United States Congress. It is located in the legislative branch of the United States government.-History:...

report GAO-06-172R http://www.gao.gov/docdblite/details.php?rptno=GAO-06-172R