| 摘要 |
<p>A shielded modular jack (10) is provided for interfacing a modular plug (12) with a printed circuit board (36). The plug has an external conductive shield (46), and the jack includes a dielectric housing (14) having a plug-receiving cavity (28). A plurality of terminals are mounted on the housing with resilient cantilevered contact arms (54) extending into the cavity for engaging respective contacts (42) of the plug when the plug is inserted into the cavity. An electrically conductive shield (20) includes a pair of electrically isolated shield portions (70) each having a board contact (84) projecting beyond the housing for contacting a circuit trace on the printed circuit board, along with a shield wall (72, 82) disposed in the plug-receiving cavity for electrically contacting the shield on the plug when the plug is inserted into the cavity. The inserted plug electrically couples the shield portions and, thereby, establishes electrical continuity between the circuit traces on the printed circuit board. A shunt module (18) is inserted into a second cavity part (32) in the jack housing. The shunt module includes a dielectric housing (60) mounting at least a pair of normally closed shunt terminals (62, 64) each including a board contact (62B, 64B) projecting beyond the housing for contacting a circuit trace on the printed circuit board. One of the shunt terminals (62) has an actuating portion projecting into the plug-receiving cavity for engagement by the plug to open the normally closed shunt terminals when the plug is inserted into the plug-receiving cavity. <IMAGE></p> |
