The INTCERA 40G QSFP + ER4 optical module (GQS-SPO400-ER4C) imathandizira kufalikira mtunda mpaka 40km pogwiritsa ntchito CWDM wavelengths (1271nm, 1291nm, 1311nm, 1331nm).Zapangidwira 40G Ethernet 40GBASE-ER4 ndi OTN OTU3 zolumikizira pa duplex single mode ulusi.