Use only the SFP modules with your Modular Fast Ethernet line card. Each SFP module contains an internal serial EEPROM that is security-programmed by the SFP manufacturer with information that provides a way for Cisco (through the Cisco IOS software) to identify and validate the SFP module as a module type that was tested and qualified by Cisco to operate properly with Cisco Modular Ethernet line cards.
Cisco GLC-SX-MMD 1000Base SE-SX SFP Transciever
Product Name: CISCO Gigabit Multimode
Product model: GLC-SX-MMD
Wavelength parameter: 1000BASE-SX
Product wavelength: 850nm
Product transmission distance: 0.5km
Product optical port: SFP
Product fiber interface: dual LC interface
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