CC-QKK110M-SD Standards The 100G QSFP28 SR4 is a 4×25Gbps multi mode fiber, hot pluggable optical transceiver. The module integrates four parallel lanes with data rate at 25.78Gbps each lane. It can transmit up to 70 m on fiber OM3 fiber or 100 m on OM4 fiber with FEC. QSFP28 Connector and Pinout Description The electrical interface to the transceiver is a 38 pins edge connector. The 38 pins provide high speed data, low speed monitoring and control signals, I2C communication, power and ground connectivity. The top and bottom views of the connector are provided below, as well as a table outlining the contact numbering, symbol and full description.