
The Cisco Compatible 400G QSFP-DD QDD XDR4 Optical Transceiver is a QSFP-DD optical transceiver delivering 400Gbps over SMF. Operating at 1310nm with a MPO-12/APC interface, it reaches 2km and is compliant with QSFP-DD MSA, CMIS.5.0, IEEE 802.3bs. Built-in digital diagnostics give real-time access to operating parameters, making the module easy to deploy and maintain in data center interconnect, metro transport and carrier aggregation networks.
Product Highlights
- QSFP-DD form factor, 400Gbps data rate
- Wavelength: 1310nm
- Connector: MPO-12/APC
- Reach: up to 2km
- Fiber media: SMF
- DDM/DOM: Supported
Specifications
| Part Number | QDD-XDR4-400G |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP-DD |
| Max. Data Rate | 400Gbps |
| Wavelength | 1310nm |
| Max. Cable Distance | 2km |
| Connector | MPO-12/APC |
| Media | SMF |
| Transmitter Type | 1310nm EML |
| Receiver Type | PIN |
| TX Power | -3.1~4dBm |
| Minimum Receiver Power | -7.1dBm |
| Power Budget | 4dB |
| Receiver Overload | 4dBm |
| Max. Power Consumption | 9W |
| Extinction Ratio | 3.5dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 8x50G-PAM4 |
| Modulation (Optical) | 4x100G-PAM4 |
| DSP | TX and RX |
| Inbuilt FEC | No |
| Core Size | G.652/9um |
| Packaging Technology | COB (Chip on Board) Packaging |
| Protocols | QSFP-DD MSA, CMIS.5.0, IEEE 802.3bs |
Applications
The Cisco Compatible 400G QSFP-DD QDD XDR4 Optical Transceiver is used in data center interconnect, metro transport and carrier aggregation networks, where it provides a 400Gbps link over SMF up to 2km. With its MPO-12/APC optical interface, the module works directly with the SMF infrastructure already installed in most facilities. Custom labeling, packaging and compatibility coding for specific equipment vendors are available from our factory on request.
Standards and Compatibility
Compliance: QSFP-DD MSA, CMIS.5.0, IEEE 802.3bs. 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.
Ordering Information
Order this product as QDD-XDR4-400G. 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.
Packing Details
Standard packing is an anti-static bag plus blister protection, with cartons sized to keep products from moving in transit. We apply our standard labels by default; neutral packing or customer-branded labels, part number stickers and serial barcodes are all available on request.
Customization Service
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.
Worldwide Delivery
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.
Our Testing Process
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.



