This is a CAT 3 jack for use with telephone connections. The opening is an RJ12 and will accept RJ11 and RJ12 connectors. This is a 110 style jack, meaning that a 110 punch down tool is required to connect the wires.
Use this jack wherever you need to plug in a phone cable instead of a data cable. The jack is industry standard and will fit nicely into any of our wall plates.
This jack is wired for RJ11, RJ12 and 2-6 wire RJ45 telephone connectors, meaning the inside 6 contacts are used 6P6C, a normal telephone connection only uses 2 of these contacts. RJ11 and RJ12 connectors are the modular connectors that you use to connect a standard telephone to the wall outlet. Both connectors are the same, except that an RJ12 has 6 of the connectors wired where the RJ11 only has 4 of the connectors wired.
Here are some helpful wiring suggestions:
Pin 3, 4 for Line 1 (Blue) Pin 2, 5 for Line 2 (Orange) Pin 1, 6 for Line 3 (Green)