Accelight AQP100C-LR4 optical transceiver is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA) and compliant to IEEE 802.3bm. The transmitter integrates 4- directly modulated Distributed Feedback Laser (DFB) with center wavelength of 1296 nm, 1300nm, 1305nm and 1309 nm. The 4 optical signals are multiplexed into one single mode fiber. On the receive side, the four lanes of optical data streams are optically de-multiplexed and each data stream is recovered by a PIN photo-detector and trans-impedance amplifier. It’s a hot pluggable module with CDR integrated, and a serial EEPROM that allows the user to access the monitoring and configuration data via a Two Wire Serial interface (I2C).