The 2A-137G Fiber Single-Mode 1.25G SFP Transceiver Module provides 1 GbE connectivity up to 10 kilometers. The transceiver can be installed in both transmitters and receivers. As a hotpluggable module with a standard duplex connector for fiber communications, the 2A-137G works with single-mode-fiber (SMF) connections and operates at a nominal wavelength of 1310 nm which makes it a cost-effective and high performance transceiver.