I know for most phones it doesn't make any difference, but I have some Hold circuits that require correct polarity.
Rewire the jack that you are connecting the Telo to.
http://www.ehow.com/how_6329698_fix-rev ... iring.html
Get an inexpensive crimper and some crimp on plugs and make one yourself.
http://www.amazon.com/Leviton-C0260-I-P ... B00004YUMD
Telo with 2 Handsets, a Linx, and a Safety Phone
Telo2 with 2 Handsets and a Linx