Hot-pluggable QSFP-DD form factor full-duplex transceiver module 4-channel 1310nm EML transmitter and PIN photo-detector array Data rate up to 106. 125GBd PAM4) per channel Retimed 400GAUI-8 electrical interface Compliant with QSFP-DD MSA, CMIS 4. As a. Cisco QSFP-DD and OSFP 800G ZR/ZR+ digital coherent optics modules enable 800G traffic over amplified Dense Wavelength-Division Multiplexing (DWDM) links up to 120 km for 800ZR and over 1000 km for 800G ZR+. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals, and multiplexes them into a single. This Giglight GQD-SPO401-LR4C product is designed for 10km optical communication applications. The 400G QSFP-DD PLR4 modules are compatible with IEEE 802.