This JDSU WaveReady MDX-02MDW001A Dual 1310/1550nm Multiplexer/Demultiplexer is in excellent, like new condition and is guaranteed to be fully functional with a 30-day return policy. These Multiplexer/Demultiplexers came from a test measurement equipment rental/lease company that had surplus lightly used equipment and were quite possibly never put into service. Please feel free to contact us with any questions. Key Features · High isolation supports bi-directional and uni-directional modes of operation · Extended operating temperature range suitable for remote office environments · Forward compatibility with DWDM modules for hybrid capacity upgrades · Low end-to-end insertion loss · LGXTM compatible modules can be installed in minutes Applications · Full duplex bi-directional communications over a single fiber · Fiber exhaust / fiber sparing with legacy 1310 nm optical equipment The WaveReadyTM 3000 series Dual 1310/1550 multiplexer/demultiplexer bridges the gap between legacy systems and new revenue-generating services by allowing 1550 nm CWDM or DWDM optical channels and legacy 1310 nm traffic to be combined without disruption. With its ultra-wide bandwidth and very high isolation, the Dual 1310/1550 Mux/Demux is well suited for bi-directional applications. The Dual 1310/1550 Mux/Demux can be installed within minutes into any LGXTM compatible shelf without tools. The WaveReadyTM 3000 Series Dual 1310/1550 Mux and Demux are NEBS qualified and designed to operate reliably under remote office environmental conditions.