Serial Front Panel Data Port(Serial FPDP or SFPDP) is a high speed low latency data streaming serial communication protocol. It currently supports three distinct speeds, 1.0625 Gbit/s, 2.125 Gbit/s, 2.5 Gbit/s. Serial FPDP can operate over long distances, up to 10 kilometres (6.2 mi), using optical fiber cables, or shorter distances over copper cables.
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Serial FPDP Wikipedia(Text) CC BY-SA