CC-QKKLL4L-SD Description The 40km 100GBase-ER4 QSFP28 transceiver is designed to meet the requirements of 100G ethernet links over SMF up to 40km. It is compliant with QSFP28 MSA, IEEE 802.3ba. It is cost-effective, low power consumption with a single 3.3V power supply. The module has an aggregate bit rate up to 103.125Gbps by multiplexing of 4 independent LAN-WDM optical lanes, each lane capable of transmitting 25.78125Gb/s over 40km SMF with FEC. It is fabricated with all-metal and compact size housing for superior EMI performance.