A connector assembly for interconnecting an end of a cable comprising one or more twisted pair conductors, each of the conductors enveloped in an insulating covering, with the bifurcated contacts of a connecting block. The assembly comprises an insulated housing and a plurality of non-contacting conductive terminals disposed in the housing. Each of the terminals comprises a blade exposed along a front face of the housing and adapted to be inserted into one of the bifurcated contacts, and a piercing mechanism comprising at least one tooth. Each of the conductors is terminated by one of the terminals, the teeth puncturing the insulated covering of a free end of the conductor thereby bringing the terminal into conductive contact with the conductor.