Four optical designs cover every 40G scenario. Parallel SR4 delivers 150 meters over MPO trunks, CWDM-based LR4 and ER4 span 10 to 40 kilometers on duplex single-mode, and BiDi runs 40G over existing duplex multimode.
40G QSFP+ SR4 MPO-based 40G reaching 100m on OM3 and 150m on OM4.
40G QSFP+ LR4 The standard 40G single-mode optic, Cisco QSFP-40G-LR4 compatible.