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Cisco

Cisco QSFP-40G-CSR-S | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12

SKU:QSFP-40G-CSR-S

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Description

Extended-reach multimode QSFP+ for 40GbE, ideal for campus and data center aggregation. Uses MPO-12 parallel optics to deliver up to 400 m over OM4 (300 m OM3) with proper cabling and polarity.

Features

- Extended-reach 40GbE over MMF for flexible campus/DC design
- MPO-12 parallel optics for high-density connectivity
- 4x10G breakout support on capable platforms
- Digital diagnostics for proactive monitoring
- Hot-pluggable QSFP+ simplifies maintenance

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: What is the difference between SR4 and CSR4?
A: CSR4 offers extended reach over MMF: typically 300 m on OM3 and 400 m on OM4, compared to 100/150 m for SR4.

Q: Does this module use LC or MPO?
A: It uses an MPO-12 (also called MTP-12) connector.

Q: Can I use it for 4x10G breakout?
A: Yes, when the switch supports breakout and you use an MPO-to-4xLC or MPO-to-4xMPO breakout cable as required.

Q: What cabling is recommended?
A: OM3 or OM4 MMF with Type-B polarity MPO trunks; use low-loss components for longer runs.

Technical Specifications

- Speed: 40 GbE
- Form factor: QSFP+
- Optical standard: 40GBASE-CSR4
- Wavelength: 850 nm (VCSEL)
- Fiber type: MMF (OM3/OM4)
- Reach: up to 300 m (OM3) / 400 m (OM4)
- Connector: MPO-12 (MTP-12), Type-B polarity
- Hot-swappable: Yes
- Digital diagnostics (DOM/DDM): Supported
- Breakout: Supports 4x10G with compatible switch and cabling

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