Tripp Lites T1, RJ45-RJ45, (RJ48C) cross-over patch cable is constructed with premium Quabbin 9720, T1 certified cable. Two individually shielded, 22AWG, 100ohm pairs, maximize the performance of your expensive T1 circuits and equipment. Beware of generic T1 patch cables made with inexpensive Cat5 unshielded patch cable. The American National Standards Institute (ANSI) states in ANSI T1.403 that T1 cable be constructed of two balanced pairs, 22 AWG solid conductor, 100ohm impedance, with a loss budget of 5.5db. Tripp Lite T1 Shielded RJ48C Cross-over Cable (RJ45 M/M), 10-ft. is one of many Networking Cables available through Office Depot. Made by Tripp Lite.