Axiom 1000BASE-CWDM SFP 1550nm Transceiver for MSA - S1G-40CW55-AX - For Data Networking, Optical Network - 1 x LC 1000BASE-CWDM Network - Optical Fiber - 1550 nm Wavelength - Single-mode - Gigabit Ethernet - 1000Base-CWDM - 1 Gbit/s - 40 km Maximum Distance: