An approach is described for providing shared trunking between a telephony gateway and an end office switch. In addition, the invention provides flame retardant styrene resin compositions comprising styrene resin, polyphenylene ether resin, and the phosphonate compound. The receptacle prevents insertion of the hair dryer therein when the switch is in the ON position. As the degree of this backward curvature approaches 210 degrees, the recurve bend further positions a hook attachment pivot point below axis of the body of the interarch device in the vertical plane.