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PLRI (Parallel Logic Radio Interface) is a set of circuits of interest to radio amateurs Amateur Radio (hams). These circuits are fully compatible with IRLP (Internet Radio Linking Project). IRLP is trademarked by Dave Cameron. The circuit shown below is the Deluxe PLRI interface, and is used to connect a radio to a PC using a parallel port and sound card. This circuit is fully compatible with the Version 3 IRLP board, and can be used in place of an IRLP board. This circuit allows negative or positive COS from the radio, and also supports negative or positive PTT keying. This circuit can be home built for roughly $20 US. File:plrid.jpg This circuit can be used with several software packages, such as Asterisk, Allstar, app_rpt, IRLP, RtpDir, TheLinkBox, Echolink 〔Taylor 2004〕 or as a repeater controller board under any of the supported Linux software packages. ==History== Development on the prototype interface began in 2008. All of the PLRI circuits are original designs by Kyle Yoksh, K0KN, and therefore not reverse-engineered from the IRLP board or elsewhere. The PLRI circuit has had three major revisions so far. Besides the interface shown here, there are also three other PLRI circuits. One is a multi-radio version that supports up to 5 radios to be controlled by a single parallel port, and also supports serial operation. One is an adapter to allow use of an IRLP board to be controlled by a serial port, and the other provides the AUX 1,2,3 outputs not found on early IRLP boards. All PLRI circuits can be found at http://www.qsl.net/k0kn/plri 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Plri」の詳細全文を読む スポンサード リンク
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