• Arista 400G QSFP-DD to QSFP-DD passive twinax DAC cable, 1m black braided
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Arista

Arista CAB-D-D-400G-1M | 400G QSFP-DD to QSFP-DD Passive DAC Cable, 1m

CAB-D-D-400G-1M

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Description

This 1 m passive twinax direct attach copper cable provides a 400G link between two QSFP-DD ports using 400GBASE-CR8. It carries 8 lanes of 50G PAM4 signalling in line with IEEE 802.3cd. Suited to short-reach connections between top-of-rack switches, servers and adjacent data centre equipment where a low-cost, low-power copper interconnect is preferred over optics.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Passive twinax copper construction
- QSFP-DD connectors at both ends
- 400GBASE-CR8 over 8 lanes of 50G PAM4
- Suited to short in-rack and adjacent-rack links

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

- Connector: QSFP-DD to QSFP-DD
- Data rate: 400G
- Standard: 400GBASE-CR8, IEEE 802.3cd
- Signalling: 8x50G PAM4
- Cable type: Passive twinax copper DAC
- Length: 1 m

FAQs

Q: What connectors does this cable use?
A: It has a QSFP-DD connector at each end, so it links two QSFP-DD ports directly.

Q: Is this an active or passive cable?
A: It is a passive twinax copper DAC with no active electronics in the cable ends.

Q: What standard does it support?
A: It supports 400GBASE-CR8 as defined in IEEE 802.3cd, using 8 lanes of 50G PAM4.

Q: What is the cable length?
A: The cable is 1 m long, intended for short-reach connections such as within a rack or between adjacent racks.

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