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#107571 by peabody
Wed Mar 06, 2013 8:53 pm
The line polarity at the Telo's phone jack is correct, but when I connect a normal phone cord from that jack to a wall jack to drive the rest of my house, that reverses the polarity at all the house jacks. I think that's because a normal phone cord is actually a crossover cord. Do they make straight-through phone cords, or adaptors that reverse polarity?

I know for most phones it doesn't make any difference, but I have some Hold circuits that require correct polarity.
#107572 by murphy
Thu Mar 07, 2013 3:35 am
Today I don't think manufacturers pay any attention to phone cord polarity. Try a few more cords to see if you have one that will fix your problem.


Rewire the jack that you are connecting the Telo to. ... iring.html


Get an inexpensive crimper and some crimp on plugs and make one yourself. ... B00004YUMD
#107575 by peabody
Thu Mar 07, 2013 6:21 am
I checked in the box my old DSL modem came in, and found not just one, but two straight-through cords - a long one and a short one. I'm not sure why a DSL modem would need them, but there they are. Anyway, that solves the problem.

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