40Gb/s 40km QSFP + Transceiver wani nau'i ne mai ɗaukar hoto wanda aka tsara don aikace-aikacen sadarwa na gani na 40km.Zane ya dace da 40GBASE-ER4 na daidaitattun IEEE P802.3ba da QSFP Multi-Source Yarjejeniyar (MSA).