• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista QSFP-40G-UNIV-Arista | 40G QSFP+ Universal Transceiver, MMF/SMF, 150m/2km, LC

QSFP-40G-UNIV-Arista

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Description

The Arista QSFP-40G-UNIV is a versatile 40G QSFP+ optical transceiver designed to simplify 10G to 40G network upgrades without changing existing duplex fiber infrastructure. Supporting both multimode and single-mode fiber over standard LC connectors, this transceiver delivers 40GBASE-LM4 throughput up to 150m over OM3/OM4 MMF and up to 2km over OS2 SMF at 1310nm wavelength. Ideal for data centers, enterprise networks, and leaf-spine architectures, the universal design eliminates the need for costly parallel ribbon fiber deployments while offering interoperability with IEEE 40GBASE-LR4 and 40G-LRL4 standards.

Features

Supports both OM3/OM4 multimode and OS2 single-mode fiber for deployment flexibility
- Duplex LC connector enables reuse of existing 10G fiber infrastructure without costly upgrades
- Built-in optical multiplexing and de-multiplexing for duplex fiber operation
- Interoperable with IEEE 40GBASE-LR4 and 40G-LRL4 standards for multi-vendor compatibility
- Hot-swappable QSFP+ form factor for seamless installation and replacement
- Digital Diagnostics Monitoring (DDM) via I2C interface for real-time transceiver health monitoring
- Low power consumption (<3.5W) for energy-efficient operation
- Compliant with SFF-8436 MSA and IEEE 802.3ba 40GBASE-LM4 standards
- Supports link distances up to 150m over multimode fiber and 2km over single-mode fiber
- Ideal for data center leaf-spine architectures, enterprise core/distribution layer, and high-performance computing networks

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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Technical Specifications

FAQs

Technical Specifications

Form Factor: QSFP+ pluggable optical transceiver
- Data Rate: 40 Gbps (40GBASE-LM4)
- Wavelength: 1310nm
- Connector: Duplex LC
- Fiber Type: OM3/OM4 multimode or OS2 single-mode
- Transmission Distance: Up to 150m over OM3/OM4 MMF, up to 500m–2km over SMF
- Power Consumption: <3.5W
- Loss Budget: 2.0 dB (MMF), 2.5 dB (MMF typical), 4.5 dB (SMF typical)
- Standards Compliance: SFF-8436 MSA, IEEE 802.3ba 40GBASE-LM4, interoperable with 40GBASE-LR4 and 40G-LRL4
- Digital Diagnostics Monitoring (DDM): Supported via I2C interface
- Operating Temperature: 0°C to 70°C (commercial)

FAQs

Q: What makes the QSFP-40G-UNIV transceiver 'universal'?
A: The QSFP-40G-UNIV operates on both multimode (OM3/OM4) and single-mode fiber using standard duplex LC connectors. This eliminates the need for parallel MPO-12 ribbon fiber infrastructure required by 40GBASE-SR4, allowing you to reuse existing 10G fiber cabling for 40G upgrades without changing patch panels or trunk cables.

Q: What are the supported transmission distances for this transceiver?
A: The transceiver supports up to 150m over OM3 and OM4 multimode fiber, which covers approximately 95% of installed data center links. Over single-mode fiber (OS2), it supports distances from 500m up to 2km depending on optical budget and link configuration.

Q: Is the QSFP-40G-UNIV compatible with standard 40GBASE-LR4 optics?
A: Yes, the QSFP-40G-UNIV is optically interoperable with IEEE 40GBASE-LR4 and 40G-LRL4 standards, allowing easy connection to third-party routers and switches. It uses the same 1310nm wavelength and duplex LC interface, ensuring broad interoperability across multi-vendor environments.

Q: Does this transceiver require special licensing or minimum firmware versions?
A: The QSFP-40G-UNIV is supported on all Arista switches with QSFP+ ports. Minimum EOS (Arista operating system) versions may be required for full Digital Diagnostics Monitoring (DDM) display and platform support. Check Arista documentation for your specific switch model.

Q: Can I use this transceiver to connect Arista switches to non-Arista equipment?
A: Yes, the QSFP-40G-UNIV adheres to industry-standard specifications (SFF-8436 MSA, IEEE 40GBASE-LM4) and is interoperable with 40GBASE-LR4 devices from other vendors. It is not a proprietary product and can integrate into multi-vendor 40G environments using standard duplex single-mode or multimode fiber.

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