GLC-T 1000BASE-T Optical Transceiver Module , Cisco Compatible SFP Modules Product Features: Compatible Cisco GLC-T SFP 1000BASE 1years Warranty RJ-45 Copper Up to 1.25Gb/s bi-directional data links Hot-pluggable SFP footprint Extended case temperature range (0C to +85C ) Fully metallic enclosure for low EMI Low power dissipation lt,1.05 W typical Compact RJ-45 connector assembly Access to physical layer IC via 2-wire serial bus 1000BASE-T operation in host systems. The Models Brief: GLC-T Cisco 1000 Base-T Copper SFP Module Part Number: GLC-T= Description: 1000BASE-T SFP Applications: 1.Gigabit Ethernet 2.Fiber Channel 3.Switch to Switch interface 4.Switched backplane applications 5.Router/Server interface 6.Other optical transmission systems Ordering Information: PN DESCRIBTION GLC-LH-SM GE SFP, LC connector LX/LH transceiver GLC-LH-SMD 1000BASE-LX/LH SFP transceiver module, MMF/SMF, 1310nm, DOM GLC-SX-MM GE SFP, LC connector SX transceiver GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM Products pictures: