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Tyson, Jeff. "How Serial Ports Work." 09 February 2001. HowStuffWorks.com. <http://computer.howstuffworks.com/serial-port.htm> 18 November 2008.

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Cisco Serial Adapter (CAB-25AS-MMOD=)

Serial Adapter, D-Sub(M) - RJ-45(M)

$5 - $23573

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