The SPBD-1250A4M1RD(T) from Delta Electronics, Inc. is a Fiber Optic Transceiver with Data Rate 1.25 Gb/s, Wavelength 1310 to 1490 nm, Distance/Reach 40 km, Output Power -3 to 2 dBm, Receiver Sensitivity -23 dBm. More details for SPBD-1250A4M1RD(T) can be seen below.