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GeoportGeoPort is Apple Computer's proprietary extension of the serial port. Found on a few 68K Macs and all pre-USB Power Macintosh models, it is compatible with the older-style RS-232/RS-422 port found on Macs, but also offered higher data transfer rates and a separate I/O mode. The port accepts standard 8- or 9-pin Mini-DIN connectors. While most users never used any of GeoPort's special features, it was used to fit a GeoPort Telecom Adapter, a line adapter interface creating a passive modem device. The Telecom Adapter was announced in 1996. It came in three types, two external pods (the TA and TA II) and an internal modem model all providing a standard RJ-11 phone line connector. The internal adapters fit in the Communication Slot II (CS II). Initially the adapter software could support speeds up to 14.4 kbit/s, later upgrades introduced full V.34 compliance, running at up to 33.6 kbit/s.
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