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Phone jack wiring and 4 wire connections comments posted here are open for quality discussion and participation please note we do not publish 3rd party spam comments track backs or links. 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 the diagram . Tip there are several types of telephone wall jacks you can buy depending on where youll be installing the jack baseboard jacks are square bodied fittings that screw onto the face of baseboard moldings for mounting on walls use a wall mount that sit on the face of the wall with this style you plug the phone cord into the jack so called . Rj 11 or rj11 cable is used in telephone connector compact and small has four contacts to support 4 way 2 cables it is the most widely used globally for connecting handsets connector they are . Rj11 4 pin connector pinout rj11 4 pin to rs232 pinout 3 pin xlr female 1 4 male adapter showmecables the 1 4 mono plug to xlr 3 pin female rj11 connector pinout color code an rj45 jack well discuss some options for connecting phones with rj11 connectors to an rj45 port 3 line 1 with a two line phone youll use all 4 pins