The ASF15-24-40-D from 10Gtek Transceivers is a Fiber Optic Transceiver with Data Rate 1.25 Gb/s, Wavelength 1550 nm, Distance/Reach 40 km, Output Power -5 to 0 dBm, Receiver Sensitivity -22 to -3 dBm. More details for ASF15-24-40-D can be seen below.