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Arista

Arista CAB-O-4Q-400G-2M | 400G→4x100G DAC | OSFP to 4x QSFP56 | 400GBASE-CR8 / 4x100GBASE-CR2 | Passive Copper (no wavelength) | 2 m

CAB-O-4Q-400G-2M

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Description

Passive twinax DAC for breaking out one 400G OSFP port into four 100G links. Provides simple, low-latency connectivity for short-reach runs up to 2 meters without the cost or power of optics.

Features

- 400G to 4x100G breakout without optics
- Low-latency, zero-power passive copper
- Standards-based electrical CR links
- Simple, reliable in-rack connectivity
- Cost-efficient compared to optical solutions
- Plug-and-play installation

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

- Cable type: Passive DAC twinax copper
- Aggregate speed: 400G; breakout: 4x 100G
- Host connector: OSFP (400G)
- Remote connectors: 4x QSFP56 (100G each, CR2)
- Ethernet base standards: 400GBASE-CR8 and 100GBASE-CR2
- Length: 2 m
- Reach: up to 2 m (short-reach copper)
- Lane mapping: 8 lanes to 4x 2 lanes breakout
- Power consumption: 0 W (passive)
- Typical use: 400G spine to four 100G leaf/NIC ports

FAQs

Q: What distance is supported?
A: This passive DAC is intended for short distances; the 2 m length is suitable for in-rack or adjacent-rack connections, subject to platform SI limits.

Q: Are optics or transceivers required?
A: No. The OSFP and QSFP56 ends are integrated; it is a direct-attach copper assembly.

Q: Is it multi-vendor compatible?
A: It complies with Ethernet CR standards, but some vendors enforce coding. Confirm compatibility with your specific switch/NIC.

Q: Does it require FEC?
A: Host platforms typically enable the appropriate FEC for CR links automatically. No configuration is needed on the cable.

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