The members of the CFP MSA have authored this document to provide an industry standard form factor for new and emerging high speed communications interfaces. Specifications provided in this document are given as a “delta” to the CFP MSA Hardware Specification Rev. This article will introduce you to 400G QSFP-DD and OSFP. What Is 400G QSFP-DD Transceiver? QSFP-DD (also called QSFP56-DD) stands for Quad Small Form Factor Pluggable Double. Support for Ethernet/OTN clients, and line-side transmission of 100Gbps QPSK modulation up to 400Gbps 16QAM Supports an expansive list of interoperability modes including OpenROADM MSA, CableLabs, and the Optical Internetworking Forum (OIF) Supports DCI, access aggregation, wireless 5G backhaul. Eoptolink's 200G PAM4 CFP2 transceiver module is designed for 200 Gigabit Ethernet links over 10km/40km single mode fiber. Various high-speed transceiver types are on the market, including SFP+, SFP28, QSFP+, QSFP28, QSFP56, QSFP112, QSFP-DD, OSFP, etc. What are the differences between them? In this post, we'll explore the key differences between those optical transceivers and help you choose the right one. As shown in Figure 2-1, it is comprised of high-data lanes, a single reference clock from hosts, a single 3.