The ASF15-24-120-D from 10Gtek Transceivers is a Fiber Optic Transceiver with Data Rate 1.25 Gb/s, Wavelength 1550 nm, Distance/Reach 120 km, Output Power 1 to 5 dBm, Receiver Sensitivity -32 to -9 dBm. More details for ASF15-24-120-D can be seen below.