(( On 04-17-1997, Ken Smith wrote to Dave Shiner: ))
KS>The red wire is ring and the green is tip.  The ring side has around -48 
VDC
KS>and the tip side should have zero VDC.  The phone system uses a positive
KS>ground so the ring has a negative voltage on it.
Does the phone system actually have a 'ground' side, or is it a true
balanced pair?
Dave
davel@execpc.com
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