It is used to convert multi-mode fiber signal to single-mode or single-mode fiber signal to single-mode equivalent that extends the long span fiber connections easily and inexpensively. This media converter can be installed as a standalone unit or as a slide-in module to the 19" converter rack (up to 14 units) for use at a central wiring closet. Key Features ■Support 1000Base-SX/LX Multi-mode to Single-mode ■Support 622M SONET OC-12 multi-mode to single-mode conversion ■Support 155M ATM OC-3/ 100M Fast Ethernet multi-mode to single-mode conversion ■Easy Fiber Transceiver Upgradeable ■Good for Application to Extend the Network Distance Up to 70Km ■Standalone or composite applications