Parallel Logic Radio Interface
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PLRI: Parallel Logic Radio Interface
PLRI (Parallel Logic Radio Interface) is a set of circuits of interest to radio amateurs (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.
This circuit can be used with the IRLP software, RtpDir, TheLinkBox, or as a repeater controller board under any of the supported Linux software packages.
This project includes a set of electronic schematics of interest to radio amateurs (ham radio).
These circuits are compatible with the IRLP voice-over-IP (VOIP) system, and can be used for Echolink, IRLP, Asterisk and D-Star systems using the RtpDir or TheLinkBox software packages.
The PRLI Deluxe Interface Circuit can be directly connected to the node radio(s), or connected to the node radio(s) via a standard Rigblaster-type radio interface.
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