ADD-MODE-STSC5-3 is a 3m 50 micron Fiber Optic Mode Conditioning Patch Cable. This cable is a duplex multimode cable with a short segment of single mode fiber at the transmitting end. Specifically, it includes a 2 x ST 50/125 micron to 1 x SC 50/125 & 1 x SC 9/125 micron cable. The Mode Conditioning Patch Cable uses an offset splicing coupler, coupling the single mode fiber to the multimode section of the cable. The offset occurs from the center of the multimode fiber. Addon's Fiber Mode Patch Cables are to be used with LX, or longwave Gigabit Ethernet transceivers that use both SM and MM fibers. With normal MM patch cables, the transceivers can generate multiple signals causing Differential Mode Delay (DMD), severely limiting transimission distances. Addon's Fiber Mode Conditioning Cables remove these multiple signals, eliminating problems at the receiver end. The Low-Smoke Zero-Halogen(LSZH) jacket protects from toxic and corrosive gases in badly ventilated spaces and other areas where it is most crucial. These cables are recommended for multimode cable runs greater than 50 feet . _x000D__x000D_Addoncomputer.com FIber Mode Conditioning Patch Cables are 100% compliant for all of your networking needs. They are compliant with IEEE 802.3z and provide low insertion loss. Now you have a cost effective solution to your network upgrade needs.