The Extreme-compatible SFP transceiver provides up to 80km of 1000Base-BX throughput over single-mode fiber (SMF) using 1490nm-TX/1550nm-RX wavelengths via LC simplex connectors. This bi-directional unit must be used with another transceiver or network equipment of complementary wavelengths.It provides 1000BASE Ethernet connectivity options for Fast Ethernet, Telecom and Data Centers.