Abstract: A digital signal cross-connect having a relatively high digital signal transmission rate for use with telecommunications transmission networks mountable in an existing network bay frame designed for mounting digital signal cross-connects having substantially lower signal transmission rates comprises a housing having at least a top panel and a bottom panel. A mounting tang is disposed on the top panel, and a mounting notch is located on the bottom panel. The mounting notch is capable of accepting rail tangs of a shelf which in turn mounts to on the network bay frame. The cross-connect is capable of pivotal movement about the rail tangs when the rail tangs are disposed in the mounting notch, and the mounting tang is capable of releasably engaging a rack rail on the shelf.