> This is exceedingly odd.  As a power engineer in training I would say
> somebody did a really rotten job designing the power supply in one of your
> machines.  Was there any other equipment on either of the machines's
> outlets?  Poor power regulation aside, I don't see how a phase difference
> affected the serial port.  I hope that in general at least this isn't a
> problem.   

I heard people say that with an RS232 connection, there might be a problem due 
to the differences in the ground potential of the 2 systems involved. Can you 
comment on this, as a power eng ?

        Thank you.


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