28AWG, silver satin jacket Terminated with RJ12 (6P6C) plug on both end 6 conductor reverse wiring pin1 -- pin6 (white) pin2 -- pin5 (black) pin3 -- pin4 (red) pin4 -- pin3 (green) pin5 -- pin2 (yellow) pin6 -- pin1 (blue) Reverse wiring is generally used for voice application.