Xiaofan Chen <xiaofanc <at> gmail.com> writes:
> I do not know much about X-10. But I think ASi bus can be

X10 is a powerline protocol meant for home automation. It is not particularly
brilliant. There are other powerline signalling protocols that are much better
and have good support from third parties (like Philips carrier current modem
chips and so on). Carrier current and wireless have the same problem: noise
immunity is insufficient for anything but reasonably quiet office environment or
home use. FO seems to be the best solution currently for industrial and code
compilant outdoor data wiring (the FO has no dc conductive path so a lot of
sloppiness in grounding can be tolerated and crosstalk is inexistent between
parallel cables). FO wiring cost is below $1/meter for 4 core outdoor FO and is
hard to beat, and I can see it becoming common even in indoor wiring where rack
to rack connection is already FO in some cases (PBX, measuring interfaces to PC
etc).

Peter



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