Straight wiring is generally used for data application.

28AWG (CCA) silver satin jacket

Terminated with RJ12 (6P6C) plug on both end

6 conductor straight wiring

pin1 --- pin1 (white)
pin2 --- pin2 (black)
pin3 --- pin3 (red)
pin4 --- pin4 (green)
pin5 --- pin5 (yellow)
pin6 --- pin6 (blue)