The TV4xxxx(STM-4/OC-12) from Teradian is a Fiber Optic Transceiver with Data Rate 622.08 Mbps, Wavelength 1293 to 1580 nm, Distance/Reach 15 to 80 km, Output Power -15 to 2 dBm, Receiver Sensitivity -30 to -28 dBm. More details for TV4xxxx(STM-4/OC-12) can be seen below.