Siemon's MC 6 modular cords are the key to unlocking the next generation performance of System 6 (MAX 6, CT 6, and HD 6) products. MC 6 modular cords utilize patented, metallic isolator shields for optimum NEXT performance and a slide-on boot to ensure proper bend relief. All Siemon factory assembled MC 6 cords are 100% factory transmission tested to 250 MHz.