Patent ID: 6918794

Claim:
A modular jack, which permits insertion of a full sized plug and prevents insertion of a smaller sized plug, comprising: an insulative housing having a plug-receiving cavity; a plurality of conductive terminals each including a contact portion extending into the plug-receiving cavity; and an anti-mismating member mounted to a rear portion of the insulative housing, the anti-mismating member comprising a metal main portion and an insulative portion extending forwardly from the metal main portion, the insulative portion including an inclined surface at a free end thereof and a top surface on an inner side of the inclined surface, the inclined surface being urgeable upwardly by an inserted full-sized mating plug to clear the stop surface off the path of plug insertion, the stop surface upon being contacted by an inserted smaller sized plug preventing the smaller sized plug from being inserted further wherein the insulative housing comprises a top wall, the top wall comprising a receiving groove accommodating a spring arm and the insulative portion of the anti-mismating member, the spring arm comprising a plurality of barbs engaging with the receiving groove.