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PATH Hardware Documentation
> PowerBook G3 Series 1999
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The computer has a directed infrared (IR) communication link connected internally to serial port B. When the computer is placed within range of another device with an IR interface, it can send and receive serial data using one of several communications protocols. The other device may be another IR-equipped PowerBook, a desktop computer with an IR communications link, or some other device that complies with the Infrared Data Association (IrDA) standard. The minimum range of the IR link is approximately 2 inches, and the maximum range is 34 inches for IrDA compliant devices and 6 feet for PowerBooks.
The IR link in the Macintosh PowerBook G3 Series computers supports IrDA at up to 4.0 Mbps. The IrDA modulation method complies with the IrDA physical layer standard, which can be found at ftp://irda.org.
