Cisco Systems GLC-GE-100FX= 100Base-FX SFP Transceiver ModuleCondition:* New Surplus Stock, In OEM Packaging. As Pictured.Additional Notes:* Small Form-Factor Pluggable (SFP) Fast Ethernet Interface Converter* Hot-Swappable Device That Plugs Into a Gigabit Ethernet SFP Port on Cisco Catalyst 3750 Series, 3560 Series, And 2970 Series Switches* Application/Usage: Data Networking* Interfaces/Ports Details: 1 x LC Duplex 100Base-FXCisco SystemsGLC-GE-100FX