Description
The AddOn QDD-400GB-VSR4-J-AO is a Juniper Networks® compatible QSFP-DD optical transceiver that delivers 400GBase-SR4 PAM4 throughput up to 50 meters over multimode fiber (MMF). Operating at a wavelength of 850nm and using an MPO-12 connector, this hot-swappable module ensures seamless integration into high-performance data center and enterprise switching environments.
Engineered for reliability and compliance, it supports IEEE 802.3ck/802.3db, CMIS Rev4.0, and Digital Optical Monitoring (DOM) for real-time performance tracking. Built in a metal QSFP-DD MSA package to minimize EMI, this transceiver offers excellent ESD protection, RoHS compliance, and full TAA compliance.
Each unit is programmed, uniquely serialized, and tested for guaranteed compatibility and performance identical to the Juniper Networks® OEM equivalent. Backed by AddOn’s limited lifetime warranty, this transceiver is a cost-effective and dependable solution for next-generation networking.
| Specification | Details |
|---|---|
| SKU | QDD-400GB-VSR4-J-AO |
| Form Factor | QSFP-DD |
| Data Rate | 400GBase-SR4 PAM4 |
| Wavelength | 850nm |
| Max Reach | 50m over MMF |
| Connector | MPO-12 |
| Fiber Type | Multi-mode Fiber (MMF) |
| Channels | 4 optical lanes @ 53.125 GBd PAM4 |
| Electrical Interface | 8 lanes @ 26.5625 GBd PAM4 (AUI-8 C2M) |
| Operating Temperature | 0°C to 70°C (Commercial) |
| Power Dissipation | 8W (typical) |
| Compliance | IEEE 802.3ck, IEEE 802.3db, QSFP-DD MSA, CMIS Rev4.0 |
| Features | Hot-swappable, DOM support, Lower EMI, Excellent ESD protection |
| TAA Compliant | Yes |
| RoHS Compliant | Yes |
| Warranty | Limited Lifetime Warranty |
| Compatible OEM | Juniper Networks® |
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
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