Sorry, I copied and pasted the message from a forum and it mundged the web
address.  Corrected below.

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Ok, so you want an ethernet based interconnect system in your airplane. Need
to hookup a bunch of "serial" devices to each other.... Here ya go, just put
in a switch and start plugging stuff in ...

http://www.lantronix.com/device-networking/embedded-device-servers/ -
specifically the little teeny xports...

hmm, the possibilities are limitless. BTW, I talked to a friend who found a
deal and got these modules for $7 a piece at qty 50... He's putting them all
over his house, alarm system, phone system, low voltage light controllers,
etc. He says they can also support "custom" code, nifty little buggers.

Alan