The Logilink CQ6135P is a professional network/fiber/cable tester that allows users to quickly and easily test networks, cables, and fiber optics. It features a backlit LCD display that allows users to easily read the results and view the graph that is generated by the tests. The CQ6135P also features an automatic built-in microprocessor that allows users to quickly diagnose a network or cable connection. It supports a wide range of devices, including PBX, VoIP, Wi-Fi routers, ADSL modems, range extenders, and more. The CQ6135P is the perfect choice for professionals who need a reliable and accurate way to test their networking equipment.