Abstract: A telecommunications shelf module is provided having electronic circuit packs and conductors extending from the circuit packs to an interface station for connection to conductors exterior of the pack, the module detachably mountable in a frame. The module preferably has a cooling arrangement included in its structure.

Abstract: Within an electronic shelf, physically separating or isolating in a front to rear direction keying elements from connector alignment elements to provide a separation distance, minimizes the undesirable interaction that may occur between keying elements and connector alignment elements due to tolerance effects. Worst case manufacturing tolerances with respect to keying elements, for example, no longer influence in any significant way, the co-action of the connector alignment elements. Insertion of circuit packs into respective receiving stations is achieved with less effort since effort is not required to overcome extra frictional forces resulting from the keying elements interacting with the connector alignment elements.