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| High Speed Multimedia ： ウィキペディア英語版 |
High-speed multimedia radio
High-speed multimedia radio (HSMM) is the implementation of wireless data networks over amateur radio frequencies using commercial off-the-shelf (COTS) hardware such as 802.11 access points and D-STAR equipment. Only licensed amateur radio operators may use amplifiers and specialized antennas to increase the power and coverage of the 802.11 signal.
==Basics==
The idea behind this implementation is to use the (Amateur bands ), namely 420 MHz (70 cm), 900 MHz (33 cm), 1270 MHz (23 cm), 2.3 GHz (13 cm), 3.4 GHz (9 cm), and 5.8 GHz (5 cm) under the U.S. Federal Communications Commission (FCC) Part 97 rules (amateur radio service) instead of the Part 15 rules (unlicensed). This enables licensed amateur operators to legally use higher output power for wireless devices and allows for longer-range communications. Such communications can be used to assist in emergency communications and disaster relief operations and in everyday amateur radio communications.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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