Our 400GB QSFP-DD transceivers are 100% compatibility tested and certified in our US based lab for use with Arista, Cisco, Dell, Juniper, Mellanox, Nokia, MSA generic, and data center optics - Limited lifetime warranty - Free evaluations. MSA and TAA 800GBase-ZR+ QSFP-DD Transceiver (SMF, Coherent, LC, DOM, Open ZR+) MSA and TAA 800GBase-DR8++ PAM4 QSFP-DD Transceiver (SMF, 1310nm, 10km, MPO-16, DOM, CMIS 5. 0) MSA and TAA 800GBase-DR8 PAM4. The Cisco ® family of QSFP-DD modules provide the industry's highest bandwidth density while leveraging the backward compatibility to lower-speed QSFP pluggable modules and cables. The 400G transceiver modules are ideal choice for AI data centers, enterprise networks and service provider networks. Click to get your 400G transceiver. QSFP-DD is a new module and cage/connector system similar to current QSFP, but with an additional row of contacts providing for an eight lane electrical interface. QSFP-DD extends the use. Discover how QSFPTEK helped PacketStream engineer a reliable 200G DWDM network over 36km using 25G optics, overcoming 100G module scarcity. QSFP-DD (Quad Small Form-Factor Pluggable Double Density) transceivers double the number of high-speed electrical interfaces in QSFP to achieve 400G Ethernet speeds – and double them again to reach 800G.