Description
The AddOn QDD-400G-DCO-ZR-AO is a high-performance, MSA-compliant 400GBase-ZR coherent QSFP-DD optical transceiver designed for next-generation long-haul and metro data center interconnects. Featuring a tunable C-band transmitter and coherent receiver technology, this module supports up to 120 km point-to-point transmission over single-mode fiber (SMF) while maintaining exceptional signal integrity and performance.
Operating on the 400GAUI-8 electrical interface with RS(544/514) FEC, this transceiver offers up to 425 Gbps of throughput and seamless integration into existing network infrastructures. Its Digital Optical Monitoring (DOM) enables real-time visibility into key operating parameters, while TAA compliance ensures eligibility for government and enterprise deployments. Built for reliability and efficiency, it consumes less than 18.3 W and supports a wide operating temperature range of –5 °C to 85 °C.
Engineered to deliver maximum performance and interoperability, this transceiver is ideal for long-distance data center interconnect (DCI), metro, and carrier-class optical transport networks.
| Specification | Details |
|---|---|
| SKU | QDD-400G-DCO-ZR-AO |
| Form Factor | QSFP-DD (Type 2A), Hot-Pluggable |
| Data Rate | Up to 425 Gbps |
| Electrical Interface | 8x 26.5625 GBd PAM4 (400GAUI-8) |
| FEC | RS(544/514), C-FEC (15%) with 10.7 dB Net Coding Gain |
| Transmission Distance | Up to 120 km over SMF |
| Wavelength Range | 1528.58 – 1567.34 nm (Tunable C-band) |
| Line Baud Rate | 59.84375 GBd |
| Modulation Format | DP-16QAM |
| Connector Type | Duplex LC |
| Optical Output Power | –10 dBm to –6 dBm |
| Receiver Sensitivity | ≤ –20 dBm |
| Receiver Input Range | –12 dBm to +1 dBm (Extended: –15 dBm to +1 dBm) |
| OSNR Tolerance | 24 – 26 dB |
| Chromatic Dispersion Tolerance | Up to 2400 ps/nm |
| Power Supply Voltage | 3.3 V (3.135 – 3.465 V) |
| Power Consumption | < 18.3 W |
| Operating Temperature | –5 °C to 85 °C |
| Storage Temperature | –40 °C to 85 °C |
| Connector Interface | Duplex LC |
| Compliance | MSA, TAA, RoHS |
| Digital Diagnostics | DOM (Digital Optical Monitoring) |
| Applications | Long-haul, Metro Networks, DCI, Enterprise Backhaul |
| 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
