Abstract: The disclosed module is used in a digital telecommunication network having a digital cross-connect system. The module comprises a compact, self-contained, six jack port, dual monitor, digital signal cross-connect switching module. A plurality of modules comprise a system having provisions for cross-connect switching, rerouting, repair, patch and roll and monitoring. The interior of the module housing is specifically designed to conform with its internal assemblage so as to have the total effect of providing improved digital signal performance. The internal assemblage consists of a switching mechanism, monitoring circuits, resistors, conductors, inductors and insulators providing digital signal access through its six jack ports. Two of the jack ports are multi-purpose, having provisions for monitoring as well as digital signal access. A transmission system having this module has a digital signal range of at least 300 KHz to 100 MHz.

Abstract: A unitary jack assembly to facilitate monitoring, testing, maintenance, and installation of audio and visual systems as well as telecommunication systems which utilize coaxial cables for signal transmission. The jack assembly comprises a unitary housing having two coaxial jacks extending outwardly from the front thereof which are electrically connected to two corresponding coaxial connectors extending outwardly from the rear of the housing. A third coaxial jack extends outwardly from the front of the housing and is electrically connected to one of the other two coaxial jacks. A switch is carried within the jack assembly housing and is normally electrically connected to the first and second coaxial jacks and is further adapted to ground the signal in one of the jacks when the other jack has an electrical plug inserted therein.