There is the solution about 40G QSFP+ SR4 applied in Cisco Nexus switches as below: There is a chart about more products solution options,pls check it. ETU PN Description Cable EQ854X-3MCD01 40G QSFP+ SR4 850nm 100M MPO-MPO Female Type B XXm EQ28510X-3MCD01 100G QSFP28 SR4 850nm 100m MPO-MPO Female Type B XXm EQ2DP10X-330CNxx 100G QSFP28 DAC / EQ2A10X-33CDxx 100G QSFP28 AOC / ......... Contact: Mail: info@thegioimang.vn Tel/Zalo: 0917684899