Black Box Telephone Cross-Pin Cable - RJ-11, 4-Wire, 25-ft.Connectivity from the data center to the desktop, and beyond. For performance designed to last the lifetime of your cabling system, choose Black Box. You'll get high performance copper and fiber cabling solutions for structured cabling systems, data centers, industrial environments, multimedia systems, datacomm connections, and more, including custom cables. High quality flat satin cable for data and voice applications. For typical telephone use.