a quick - detachable modular jack and face panel mounting structure includes a face panel , an inner positioning frame mounted at the back side of the face panel for holding multiple modular jacks in the face panel in a row , a limiter plate vertically movably mounted in the inner positioning frame , and control rods held down in the inner positioning frame by the limiter plate to lock the modular jacks and respectively horizontally movable to unlock the respective modular jacks .