Description
The Cisco QSFP-40G-CSR4 is a high-performance 40GBASE-CSR4 QSFP transceiver designed for short- to mid-range multimode fiber connectivity in enterprise and data center environments. Operating at 850 nm over parallel multimode fiber, this module extends 40G Ethernet reach beyond standard SR4 optics while maintaining full interoperability with 10GBASE-SR lanes.
Supporting native 40G connections via MPO/MTP connectors or 4x10G breakout configurations, the QSFP-40G-CSR4 offers flexibility for scalable network architectures. Its hot-swappable QSFP form factor ensures seamless installation and maintenance, making it ideal for high-density switching and aggregation deployments.
| Specification | Details |
|---|---|
| Brand | Cisco |
| SKU | QSFP-40G-CSR4= |
| Transceiver Type | 40GBASE-CSR4 |
| Form Factor | QSFP+ |
| Data Rate | 40 Gbps |
| Wavelength | 850 nm |
| Fiber Type | Multimode Fiber (MMF) |
| Connector Type | MPO/MTP-12 |
| Maximum Reach | 300 m (OM3), 400 m (OM4/OM5) |
| Breakout Support | Yes, 4 × 10GBASE-SR |
| Operating Mode | Parallel optics, 4 lanes |
| Power Consumption | Low power design |
| Hot-Swappable | Yes |
| Typical Use Case | Data center, enterprise core, aggregation |
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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
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Engineer
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Support
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- 24/7 remote system monitoring
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