How to Wire a Phone Jack (Voice or Telephone RJ-11 thru RJ-14) How to Wire a Phone Jack (Voice or Telephone RJ-11 thru RJ-14) (USOC Wiring Diagram) Telephone wiring for a phone outlet is typically either 1, 2 or 3 pairs (2, 4, or 6 conductor). Most cable nowadays is UTP (unshielded twisted pair). There may be instances where you may need to connect to or transpose from the old "quad" cable. straight key hookup to 1/8" phone jack and wiring | QRZ Forums Jun 05, 2016There is 3-conductor (Stereo) Phone jack in the front that is meant for paddles. Plus there is a 2-conductor (Mono) Phone jack in the rear that is intended for straight keys or bugs. The fun part is that the front 3-conductor (Stereo) Phone jac can also be use with a straight keys or bug, but then there are some menu setting needed to make it work.