Friday, October 30, 2009

Multi-Use Radio Service (MURS)

Multi-Use Radio Service

From Wikipedia, the free encyclopedia

In the United States, the Multi-Use Radio Service (MURS) is a two-way radio service consisting of five frequencies in the VHF spectrum regulated by Title 47 of the CFR (Code of Federal Regulations) Part 95. Established by the U.S. Federal Communications Commission in the fall of 2000, MURS created a radio service allowing for "licensed by rule" or "permitted by part" (Part 95) operation (rather than permitted by individual license), with a power limit of 2 watts, four times that of FRS radio. In the fall of 2002, the FCC further amended the MURS rules; these rule modifications included changing the 2 watt power limitation to be based on Transmitter Power Output (TPO), rather than Effective Radiated Power (ERP), so there is no longer an ERP limit with MURS, and external gain antennas may be utilized. The FCC formally defines MURS as "a private, two-way, short-distance voice or data communications service for personal or business activities of the general public." MURS stations may not be connected to the public telephone network, may not be used for store and forward operations, and radio repeaters are not permitted.
MURS comprises the following five frequencies:
Frequency Authorized bandwidth
151.820 MHz 11.25 kHz
151.880 MHz 11.25 kHz
151.940 MHz 11.25 kHz
154.570 MHz 20.00 kHz
154.600 MHz 20.00 kHz
Because previous business band licensees who have maintained their active license remain grandfathered with their existing operating privileges, it is possible to find repeaters or other operations not authorized by Part 95 taking place. These are not necessarily illegal. If legal, such operations may enjoy primary status on their licensed frequency and as such are legally protected from harmful interference by MURS users.

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