• Vibrant pink glossy Juniper QDD-8X50G-2M 400G DAC sticker
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Juniper

Juniper QDD-8X50G-2M | 400G→8x50G DAC | QSFP56-DD↔8xSFP56 | 400GBASE-CR8/50GBASE-CR | passive twinax | 26AWG | reach 2m

QDD-8X50G-2M

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Description

400G to eight 50G breakout passive copper DAC designed for reliable short-to-mid reach in-rack wiring. QSFP56-DD host end breaks out to eight SFP56 50G legs, offering simple, low-latency, and power-free connectivity. Compliant to 400GBASE-CR8/50GBASE-CR with CMIS for multi-vendor interoperability on breakout-capable platforms.

Features

- Eight 50G links from a single 400G port for efficient fan-out
- Passive 26 AWG twinax for dependable 2 m operation
- CMIS-managed, IEEE standards-based compliance
- Low cost and ultra-low latency versus optical solutions
- Pre-terminated ends speed deployment and reduce errors

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: QSFP56-DD to 8x SFP56 passive DAC (breakout)
- Aggregate data rate: 400GbE; breakout: 8x 50GbE PAM4
- Cable type: Twinax copper, passive
- Wire gauge: 26 AWG
- Length: 2 meters
- Electrical standards: IEEE 802.3ck (400GBASE-CR8), IEEE 802.3cd (50GBASE-CR)
- Management: CMIS
- Operating temperature: 0 to 70°C (standard temp)
- Connectors: QSFP-DD to 8x SFP56 integrated ends
- FEC: RS-FEC required per 802.3cd for 50G links (host dependent)
- Latency: Near-zero (no retimers/gearboxes)
- EMI: Shielded twinax with robust pull-latch tabs
- Compatibility: Hosts supporting QSFP56-DD 8x50G breakout and SFP56 50G ports
- RoHS compliant

FAQs

Q: What is the maximum reach?
A: This assembly is 2 meters. Ensure your platform supports 2 m passive 26 AWG links at 50G PAM4.

Q: Is it active or passive?
A: It is a passive DAC requiring no external power.

Q: Can I mix with optical transceivers on the SFP56 side?
A: No. The SFP56 ends are integrated copper; they are not receptacles for optics.

Q: Does it require FEC?
A: Yes, RS-FEC as defined in 802.3cd is typically required and managed by the host.

Q: Is it vendor-locked?
A: It is designed for platforms that support QSFP56-DD 8x50G breakout. Check your device’s compatibility matrix for coded DAC support.

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