SFP modules are field-replaceable, and you can insert them into SFP module slots on the front panel of many Cisco devices. You can use the SFP modules for connections to other devices. This SFP module is compatible with Catalyst 2950ST-24-LRE switch, Catalyst 2950ST-8-LRE switch, Cisco 11503 content services switch, Cisco 11506 content services switch, Cisco CSS5-SCM-2GE, Cisco ONS 15327 G1000-2, Cisco 12000 Series Modular Gigabit Ethernet Line Card (baseboard), WS-X4448-GB-LX Gigabit Ethernet switching module.