Fully compliant with IEEE 802.3z application standards, this cable is used where high-speed gigabit 1000Base-LX routers and switches are deployed into existing multimode plants. The need for this patch cord is due to the single-mode launch nature of the LX or long-wave (1300 nm) transceiver modules used for gigabit Ethernet. Launching a single-mode laser into the center of a multimode fiber can cause multiple signals to be generated that confuse the receiver at the other end of the fiber.