The Fluke Networks Versiv Mainframe is a high-quality unit designed for use with the DSX-5000/DSX-8000 cable testers. Made by the reputable brand Fluke Networks in the United States, this mainframe is specifically designed to test RJ45 cables with precision and reliability. With its robust construction and compatibility with top-of-the-line cable testers, the Fluke Networks Versiv Mainframe is a must-have tool for professionals in the field of testing and inspection.