Description
The AddOn Q400G-4Q56G-AOC3M-AO is a high-performance 400GBase active optical cable designed to deliver reliable, low-latency connectivity between QSFP-DD and 4xQSFP56 ports in next-generation data center and enterprise networks. Operating over multi-mode fiber (MMF) with a maximum reach of 3 meters, this cable uses PAM4 modulation to achieve data rates up to 56.15 Gb/s per lane, ensuring high-bandwidth, high-density interconnects for switches, servers, storage, and network interface cards.
Built to meet MSA and IEEE 802.3cm standards, it supports CMIS 4.0 and features DSP-free CDR technology for minimal latency and optimal signal integrity. The cable is hot-pluggable, LSZH-rated, RoHS compliant, and TAA compliant — making it ideal for government and enterprise environments requiring Trade Agreements Act compliance. Each unit is uniquely serialized, rigorously tested for data traffic and application performance, and backed by AddOn’s limited lifetime warranty.
| Specification | Description |
|---|---|
| Part Number | Q400G-4Q56G-AOC3M-AO |
| Type | 400GBase Active Optical Cable |
| Connector Type | QSFP-DD to 4xQSFP56 |
| Cable Length | 3m (9.8 ft) |
| Wavelength | 850nm |
| Fiber Type | Multi-Mode Fiber (MMF) |
| Maximum Data Rate | 56.15 Gb/s per lane |
| Total Data Rate | 400G |
| Modulation | PAM4 |
| Reach | Up to 3 meters |
| Power Consumption | 7.6W (400G end), 2.3W (100G end) |
| Power Supply Voltage | 3.3V (3.15–3.47V) |
| Operating Temperature | 0°C to 70°C |
| Storage Temperature | –40°C to 85°C |
| Relative Humidity | 5% to 85% |
| Cable Jacket | LSZH, Aqua |
| Minimum Bend Radius | 30 mm (without tension) |
| Compliance | MSA, CMIS 4.0, IEEE 802.3cm, RoHS, TAA |
| Applications | 400G Ethernet, Data Centers, Switches, Servers, Storage, NICs |
| Warranty | Limited Lifetime Warranty |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
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
