The feedthrough in-line coupler modular jacks are 6-position 6-conductor (6P6C), connect two modular cords; Pin 1 to Pin 1. Compatible with RJ11/14 and 25 modular jacks and plugs.FeaturesProvides pin 1-1 RJ-11 voice coupling.Reduced rear footprint allows for greater connectivity density.Provides for more port configurations in a smaller area.Works with all Work Area Outlets faceplates, inserts, surface mount boxes.Used with all line cords.UL listed.