Description
The AddOn Cisco® QDD-400G-LR4-S Compatible QSFP-DD Transceiver delivers high-speed 400GBase-LR4 Ethernet connectivity over single-mode fiber (SMF) for distances up to 10km using a 1310nm wavelength and a duplex LC connector. Designed to meet or exceed OEM specifications, this module is 100% compatible with Cisco® systems and is ideal for next-generation data center, enterprise, and service provider networks requiring ultra-high bandwidth and long-reach optical interconnects.
Engineered for seamless integration, the transceiver is hot-swappable and features Digital Optical Monitoring (DOM) support for real-time performance monitoring. It is TAA compliant, RoHS certified, and built with INF-8628 compliance and excellent ESD protection to ensure reliable operation and long-term performance. Each unit is programmed, serialized, and rigorously tested for data traffic and application functionality, guaranteeing identical performance to the OEM counterpart.
| Specification | Details |
|---|---|
| SKU | QDD-400G-LR4-S-AO |
| Form Factor | QSFP-DD |
| Data Rate | 400GBase-LR4 |
| Wavelength | 1310nm |
| Fiber Type | Single-Mode Fiber (SMF) |
| Connector | Duplex LC |
| Max Reach | Up to 10 km |
| Modulation Format | PAM4 |
| Data Rate per Lane | 53.125 GBd ±100 ppm |
| Number of Lanes | 4 |
| Average Launch Power (Per Lane) | -1.4 to +4.5 dBm |
| OMA (Per Lane) | 0.7 to 4.7 dBm |
| Receiver Sensitivity (Per Lane) | -6.6 dBm (OMAouter) |
| Pre-FEC BER | ≤ 2.4 × 10⁻⁴ |
| Post-FEC BER | ≤ 1 × 10⁻¹² |
| Power Consumption | 12 W |
| Supply Voltage | 3.135 – 3.465 V |
| Operating Case Temperature | 0°C to 70°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 0% – 85% (Non-Condensing) |
| Digital Diagnostics (DOM) | Supported |
| Compliance | INF-8628, IEEE 802.3bs, RoHS, TAA |
| Warranty | Limited Lifetime Warranty |
Payment & Security
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Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
