Our 400G pluggable DCOs are powered by the PSE-V Compact (PSE-Vc), part of the PSE-V family of coherent optics. The PSE-Vc supports operation at a variety of baud rates from 30 to 69GBaud. It is an ideal choice for scaling network capacity in access, metro aggregation and. A 400G QSFP-DD DR4, XDR4, or PLR4 module can be used to break a single 400G port into four independent 100G links. Instead of using one 400G connection end-to-end, the module transmits four separate 100G optical lanes over single-mode fiber, which are then presented as four individual 100G QSFP28. The capacity of passive optical networks (PONs) is continuously increasing, and it has been standardized up to 50 Gbit/s. The two main standardization organizations, IEEE and ITU-T, are actively working on the next-generation PON, which appears to be a 100G-PON still based on intensity modulation. The Cisco 400G QSFP-DD Ultra Long-Haul Coherent Optics Module enables 400G traffic anywhere over dense wavelength division multiplexing amplified networks, and is available in both C-band and L-band. Cisco has expanded the range of 400G digital coherent QSFP-DD transceivers with the 400G QSFP-DD. Rapid advances in silicon are fueling a new generation of pluggable coherent 400G router optics that open exciting new avenues for rethinking IP-optical network designs. This white paper takes a closer look at these technology advances, and their impact and applications. But pluggable modules still. Upgrade to 100G or 400G optics and save. The Cisco 400GBASE Quad Small Form-Factor Pluggable Double Density (QSFP-DD).