QDD-2X400G-DR4Juniper Networks QDD-2X400G-DR4 Compatible 800G QSFP-DD DR8 Transceiver Module
Built for hosts recognizing QDD-2X400G-DR4, this HT-manufactured QSFP-DD module delivers 800G transmission at 1310nm. Its rated reach is 500m, with MTP/MPO-16 APC as the physical interface. The specifications and engineering guidance below support high-density deployments balance optical performance, port access and thermal planning, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: QDD-2X400G-DR4HT Part Number: QDD-DR8-800G
Product Highlights
- Compatible alternative to Juniper Networks QDD-2X400G-DR4
- 800G connectivity at 850Gbps (8x 106.25Gbps)
- Optical wavelength: 1310nm
- Specified reach: 500m
- MTP/MPO-16 APC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Juniper Networks Compatible | QDD-2X400G-DR4 |
|---|---|
| Manufacturer | HT |
| HT Part Number | QDD-DR8-800G |
| Form Factor | QSFP-DD |
| Max. Data Rate | 850Gbps (8x 106.25Gbps) |
| Wavelength | 1310nm |
| Max. Cable Distance | 500m |
| Connector | MTP/MPO-16 APC |
| Media | SMF |
| Transmitter Type | EML |
| Receiver Type | PIN |
| TX Power | -2.9~4.0dBm |
| Minimum Receiver Power | -5.9dBm |
| Power Budget | 3dB |
| Receiver Overload | 4.0dBm |
| Max. Power Consumption | 16.5W |
| Extinction Ratio | >3.5dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation (Electrical) | 8x 106.25Gb/s PAM4 |
| Modulation (Optical) | 8x 106.25Gb/s PAM4 |
| CDR (Clock and Data Recovery) | TX and RX Built-in DSP |
| Packaging Technology | COB (Chip on Board) Packaging |
| Protocols | QSFP-DD MSA HW Rev 6.01, CMIS 5.0, IEEE 802.3cu, IEEE P802.3ck |
Applications and Optical Link Design
Use this module for equipment interconnection over the specified single-mode fiber plant, including enterprise backbone, campus, metro or data-center interconnect links according to its rated distance. Confirm that both ends use the same optical standard and wavelength plan, and allow for connector, splice and patch-panel loss within the stated power budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 800G interface configuration must match the remote equipment; sharing a QSFP-DD housing alone does not make two transceiver types interoperable.
Before commissioning, measure the complete single-mode channel against the stated budget for 500m. Inspect every MTP/MPO-16 APC connection and record diagnostic power where supported. Both ends must agree on rate, wavelength and optical standard.
Quality Assurance and Packaging
Each QDD-2X400G-DR4 compatible module is inspected, powered up and functionally checked before protective packing. Dust caps and individual trays shield the interface during transport. Customer references, rack groups and project packing lists can be added for volume orders.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -2.9~4.0dBm; the stated optical power budget is 3dB. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
High-Density Port and Thermal Planning
In a densely populated chassis, connector access and airflow form part of the optical-link design. Confirm that neighboring modules and patch leads leave room for latch operation, and include listed power consumption in the host thermal budget. Assess port density together with fiber management. For this model, the principal parameters are data rate 850Gbps (8x 106.25Gbps), wavelength 1310nm, rated reach 500m.
Ordering Information
When ordering, specify QDD-2X400G-DR4, QDD-DR8-800G, quantity and intended host platform. Project labels can repeat these details for receiving and asset records. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Juniper Networks Compatibility and Factory Testing
Factory verification starts with the expected QDD-2X400G-DR4 identity and finishes with an operating host link. EEPROM data, diagnostic visibility and the stated optical parameters are assessed together. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Frequently Asked Questions
Is this an original Juniper Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QDD-2X400G-DR4, not an original Juniper Networks-branded module.
Which fiber and connector are required?
Use MTP/MPO-16 APC with SMF. The specified maximum reach is 500m, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
