Cisco Compatible 400G QSFP-DD QDD LR8 Optical Transceiver

Designed for 400G Ethernet data center and cloud network environments, the Cisco Compatible 400G QSFP-DD QDD LR8 Optical Transceiver provides 425Gbps throughput in a QSFP-DD form factor. It operates at 1310nm over SMF through a Duplex LC/UPC connector and supports link lengths up to 10km. The module meets IEEE 802.3bs, QSFP-DD MSA, CMIS 4.1 and includes digital diagnostic monitoring for live status readout.

Product Highlights

• QSFP-DD form factor, 425Gbps data rate
• Wavelength: 1310nm
• Connector: Duplex LC/UPC
• Reach: up to 10km
• Fiber media: SMF
• DDM/DOM: Supported

Built for 400G Ethernet data center and cloud network environments, this QSFP-DD module carries 425Gbps over SMF up to 10km per link. The Duplex LC/UPC interface and 1310nm optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. For networks standardized on Cisco hardware, it is a drop-in equivalent of the QDD-400G-LR8-S. The link runs 8x50G-PAM4 modulation, which keeps it aligned with current 400G switch silicon.

Compliance: IEEE 802.3bs, QSFP-DD MSA, CMIS 4.1. For projects standardized on Cisco hardware, this product replaces the QDD-400G-LR8-S directly, with identical fit and function. Every unit's EEPROM coding and link behavior are verified on real host equipment in our lab, so what arrives at your site is ready to use.

Our part number for this module is QDD-LR8-400G. 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.

Standard products are held in stock and usually ship within one to three working days. We dispatch worldwide by DHL, UPS, FedEx, TNT or EMS, and for bulk orders we arrange air or sea freight. Shipments can also be sent collect on your own courier account or delivered to your freight forwarder.

Before any product leaves our factory it goes through optical performance testing, compatibility verification on real switch platforms and a final visual inspection. Our in-house test lab holds a wide range of current and legacy switches from major brands, so interoperability is proven on the actual equipment your network uses rather than assumed from paper specifications.

Each unit is sealed in an anti-static bag, cushioned in a blister tray and boxed in an export-grade carton. Outer cartons carry handling marks and can be palletized for air or sea freight. If your project requires retail boxes, barcodes or your own brand on the label, we can arrange that as well.

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.