http://www.macnn.com/articles/02/07/09/troi.serial/
Troi Serial Plug-in for serial connections
updated 07:45 am EDT, Tue July 9, 2002
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Troi Serial Plug-in 2.5 for FileMaker Pro 5.5 adds new troubleshooting functions for setting up a serial port, plugin reinitialization without application restart, and other enhancements. The $70 plugin can be used by developers to send or receive ASCII data over a serial port.
