Description Cisco Compatible 100GBASE-PSM4 QSFP28 is a 1310nm parallel single-mode transceiver reaching 2km over SMF using an MPO/MTP-12 connector. It provides a cost-effective 100Gbps solution by transmitting data over four independent lanes of 25Gbps. This transceiver is optimized for medium-reach data center interconnects requiring high-density cabling.