
The Cisco Compatible 800G QSFP-DD QDD 2LR4 Optical Transceiver is a QSFP-DD optical transceiver delivering 850Gbps (8x 106.25Gbps) over SMF. Operating at 1271nm, 1291nm, 1311nm and 1331nm with a Dual Duplex LC/UPC interface, it reaches 10km and is compliant with CMIS Rev 5.0, IEEE 802.3cu-2021, 100G Lambda MSA-400G-LR4-10, QSFP-DD MSA HW Rev 6.01. Built-in digital diagnostics give real-time access to operating parameters, making the module easy to deploy and maintain in 800G Ethernet data center and cloud network environments.
Product Highlights
- QSFP-DD form factor, 850Gbps (8x 106.25Gbps) data rate
- Wavelength: 1271nm, 1291nm, 1311nm and 1331nm
- Connector: Dual Duplex LC/UPC
- Reach: up to 10km
- Fiber media: SMF
Specifications
| Part Number | QDD-2LR4-800G |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD |
| Max Data Rate | 850Gbps (8x 106.25Gbps) |
| Wavelength | 1271nm, 1291nm, 1311nm and 1331nm |
| Max Cable Distance | 10km |
| Connector | Dual Duplex LC/UPC |
| Media | SMF |
| Transmitter Type | EML |
| Receiver Type | PIN |
| TX Power | -2.7~5.1dBm |
| Minimum Receiver Power | -9dBm |
| Power Budget | 6.3dB |
| Receiver Overload | 5.1dBm |
| Max Power Consumption | 18W |
| Extinction Ratio | 3.5dB |
| Modulation (Electrical) | 8x100G-PAM4 |
| Modulation (Optical) | 8x100G-PAM4 |
| Packaging Technology | COB (Chip on Board) Packaging |
| DSP | Broadcom |
| Inbuilt FEC | Yes |
| Protocols | CMIS Rev 5.0, IEEE 802.3cu-2021, 100G Lambda MSA-400G-LR4-10, QSFP-DD MSA HW Rev 6.01 |
Applications
Network architects choose the Cisco Compatible 800G QSFP-DD QDD 2LR4 Optical Transceiver for 800G Ethernet data center and cloud network environments: it runs 850Gbps (8x 106.25Gbps) over SMF and reaches 10km. The Dual Duplex LC/UPC interface and 1271nm, 1291nm, 1311nm and 1331nm optics match the standard cabling plant used in modern data halls, so existing trunks can be reused. Custom labeling, packaging and compatibility coding for specific equipment vendors are available from our factory on request.
Standards and Compatibility
This product is designed and tested to comply with CMIS Rev 5.0, IEEE 802.3cu-2021, 100G Lambda MSA-400G-LR4-10, QSFP-DD MSA HW Rev 6.01. It plugs into any standards-based QSFP-DD port, and compatibility coding for specific switch or router brands can be done in our factory before shipment.
Ordering Information
Order this product as QDD-2LR4-800G. Common models are stocked for fast dispatch. We can supply the module with neutral or customer-branded labels, and compatibility coding for a specific equipment vendor can be added at no extra process step.
Quality and Testing
Every unit we ship is tested in our own test bed on mainstream switch and transport platforms before packing. Our test center has been fully upgraded, which sets us apart from other third party product providers: 10G, 40G, 100G, 200G and 400G transceivers and direct attach cables are verified on the latest top brand equipment, including selected original switches that can hardly be found elsewhere.
Packaging Options
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.
Factory Custom Capability
Working directly with the manufacturer means no middleman limits. We support OEM and ODM projects, custom cable assemblies, alternative packaging and compatibility coding for major equipment vendors, with engineering support from the same team that designs our standard products.
Logistics
Our warehouse keeps fast-moving transceivers and cables ready for same-week dispatch. Courier, air freight and sea freight options are all available depending on your budget and schedule, and we consolidate multiple items into one shipment whenever it saves you cost.



