Cisco Compatible 400G QSFP-DD QDD SR4.2 Optical Transceiver

The Cisco Compatible 400G QSFP-DD QDD SR4.2 Optical Transceiver is a QSFP-DD optical transceiver delivering 425Gbps over MMF. Operating at 850nm,910nm with a MTP/MPO-12 (UPC) interface, it reaches 70m@OM3/150m@OM5 and is compliant with QSFP-DD MSA, IEEE 802.3-2015. Built-in digital diagnostics give real-time access to operating parameters, making the module easy to deploy and maintain in 400G Ethernet data center and cloud network environments.

Product Highlights

• QSFP-DD form factor, 425Gbps data rate
• Wavelength: 850nm,910nm
• Connector: MTP/MPO-12 (UPC)
• Reach: up to 70m@OM3/150m@OM5
• Fiber media: MMF
• DDM/DOM: Supported

Built for 400G Ethernet data center and cloud network environments, this QSFP-DD module carries 425Gbps over MMF up to 70m@OM3/150m@OM5 per link. The MTP/MPO-12 (UPC) interface and 850nm,910nm optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. Compatibility with Cisco systems is verified in our own test lab before shipment, so the unit works out of the box as an equivalent of QDD-400G-SR4.2-BD. The link runs 8x50G-PAM4 modulation, which keeps it aligned with current 400G switch silicon.

This product is designed and tested to comply with QSFP-DD MSA, IEEE 802.3-2015. It is interoperable with Cisco equipment and serves as a direct equivalent to the Cisco part number QDD-400G-SR4.2-BD.

Our part number for this module is QDD-SR4.2-400G. When ordering, just let us know the quantity and whether you need the compatibility coding for a particular switch brand; labeling and packaging can also follow your channel requirements.

Because we are the factory, customization is straightforward: non-standard lengths, different jacket materials, specific polarity or breakout wiring, and compatibility programming for particular switch brands are all routine work for us. Small trial orders are accepted so you can verify quality before scaling up.

We ship to customers around the world every week. Express couriers handle most orders door to door in a few days; larger consignments go by air or sea to keep freight costs down. Tracking information is provided for every shipment, and we are flexible on shipping accounts and forwarders.

Production samples and every outgoing batch pass through bit-error-rate measurement, temperature verification and plug-in compatibility checks on mainstream switches and routers. Because we are the manufacturer, any issue found in testing is fed back to the production line immediately instead of being passed on to customers.

Default packaging is simple and protective: sealed bag, blister tray, export carton. For OEM customers we also offer white-label packing, custom printed boxes and per-unit labeling with your own part numbers, so the goods can go straight into your sales channel.