The JDSU HST-3000 SIM T1/T3 Module with Cables is a high-quality cable tester and tracker designed for use in the telecommunications industry. Made by the reputable brand JDSU in the United States, this module is specifically designed for testing T1/T3 simulations. It comes with the necessary cables for easy setup and use, making it a reliable tool for professionals in the field.  Excellent condition and very clean.