StarTech Brocade BRSFP-1GECOPR Compatible SFP Module - 1000BASE-T - SFP to RJ45 Cat6/Cat5e - 1GE Gigabit Ethernet SFP - RJ-45 100m Copper 1250 Mbit/s SFP 100 m Fast Ethernet Gigabit Ethernet IEEE 802.3.
eBay