Perfect for a Variety of Applications This four-channel, parallel, the fiber-optic QSFP28 transceiver module is ideal for IEEE 802.3bm, 100GBASE-SR4 applications. The parallel design of the QSFP28 improves port density and reduces system costs. High Data Transfer Rates This QSFP28''s full-duplex optical module offers four independent transmit and receive channels that are each capable of 26-Gbps operation. This provides an aggregate data rate of 104 Gbps over 70 meters using OM3 fiber or 100 meters over OM4. The optical interface port is a male MPO connector. The four fiber positions on the left with the key up are used for the optical transmit signals (Channels 1 through 4). The fiber positions on the right are used for the optical receive signals (Channels 4 through 1). The central four fibers are not used.