JDSU serves markets that are at the heart of what's important, making virtually every network in the world faster and more reliable. JDSU leads the fastest-growing segments of the optical-networking market: tunable XFPs, transport blades, and reconfigurable optical add/drop multiplexers (ROADMs). From development and planning, through deployment and turn-up testing, to optimization and assurance, JDSU test instruments, software, and expertise ensure that all networks-xDSL, fiber, cable, and wireless-are always working at their best.