> Anyway, even w/o all that analog stuff, with a set of opto-couplers he
> can remotely reset/halt/power-up up to 20 servers directly and 2^20
> (=1,048,576) if he uses indirect addressing (a demux Matrix ;) )
I stand corrected... :o)
Opto-couplers? I use relays, much easier to understand... ;o)
Just think of the possibilites of using Selcall techniques from SSB
gear in the HF bands.
Long range, (worldwide on some bands), no third party infrastructure
to rely on, unlimited number of codes in theory; only 7 tones required
for your 2^20 multiplexed system, (that is 10^7 different codes ;oO ).
Ooooh what fun... ;oD