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 sl ide-in module to the 19" converter rack (up to 14 units) for use at a central wiring closet. Key Features ?? 10/100/1000Base-TX to 1000Base-FX converter(OPNB Series) ?? 1000Base-TX to 1000Base-FX converter(OPMC Series) ?? Auto MDI/MDIX ?? For ward 1632 bytes (Max.) packets ?? Auto-Negotiation or forced mode ?? Auto Laser Shutdown (ALS) ?? Supports Link Fault Pass through (LFP) ?? Support flow control (Pause) ?? Sup ports IEEE 802.1q Tag VLAN pass thru