(yet another) RS232 tutorial.
But quite a good one

        http://www.arcelect.com/rs232.htm

As well as a good overview it gives information of related connectors &
standards such as EIA-561 (essentially RS232 on a modular 8 pin connector).

_____________

Also a nice Belden "cable tutorial"

        http://bwcecom.belden.com/college/techpprs/wcfsbetp.HTM

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