The 400GBASE-FR4 module supports link lengths of up to 2km SMF with duplex LC connector. It is compliant to IEEE 802.3bs, 400GBASE-FR4 Spec of 100G Lambda MSA group, and 400GAUI-8/CEI-56G-VSR-PAM4 standards. The 400 Gigabit Ethernet signal is carried over four CWDM grid optical wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.
Note: The FS P/N is changed from QSFPDD-FR4-400G to QDD-FR4-400G, but the product is the same. Only the FS P/N has been changed.