The SONT 100G QSFP28 PSM4(QF28MP-P4G100-02) is a Four-Channel, Pluggable, Parallel, Fiber-Optic QSFP28 Transceiver. The QSFP28 full-duplex optical module offers 4 independent transmit and receive channels, each capable of 25.78Gbps operation for an aggregate data rate of 103.12Gbps 2km using single mode fiber. These modules are designed to operate over single mode fiber systems using 1310nm LD laser. An optical fiber ribbon cable with an MPO connector can be plugged into the QSFP28 module receptacle. QSFP28 PSM4 is one kind of parallel transceiver which provides increased port density and total system cost savings.