• Arista ADPT-O-Q-100G OSFP-to-QSFP28 100G adapter with silver SFP+ modules
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Arista

Arista CAB-O-4Q-400G-3M | 400G OSFP to 4x 100G QSFP56 DAC Breakout Cable, 3 m

CAB-O-4Q-400G-3M

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Description

This 400GBASE-CR8 passive twinax copper breakout cable connects a single 400G OSFP port (8x 50G PAM-4 lanes) to four 100G QSFP56 ports, each running 100GBASE-CR2 over 2x 50G lanes. At 3 m, it suits short in-rack and adjacent-rack links where a low-cost, passive copper connection is preferred over optics. It is a practical way to split a 400G switch port into four 100G server or switch connections.

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

Features

- Lets a single 400G OSFP port connect to four 100G QSFP ports
- Passive copper design for short-reach, cost-effective links
- Part of the Arista 400G cable family

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

Datasheet

Technical Specifications

- 400G OSFP to 4x 100G QSFP56 breakout
- 400GBASE-CR8 to 4x 100GBASE-CR2
- Passive twinax copper
- Length: 3 m
- 8x 50Gb/s PAM-4 electrical lanes on the OSFP side
- 2x 50G lanes per QSFP56 connector
- Maximum supported passive copper DAC length: 3 m

FAQs

Q: What does this cable connect?
A: It connects one 400G OSFP port on one end to four 100G QSFP56 ports on the other end, with each QSFP56 connector using 2x 50G lanes.

Q: Is this an active or passive cable?
A: It is a passive twinax copper cable, so it contains no active signal conditioning electronics and is intended for short-reach links.

Q: What is the maximum length for this type of DAC?
A: This cable is 3 m long, which is the maximum supported length for passive copper DAC breakout cables of this type.

Q: Will it work with QSFP-DD ports?
A: No. This variant is built for OSFP on the 400G side. Arista offers separate CAB-D-4Q variants for QSFP-DD ports.

Q: What speed does each breakout leg run at?
A: Each of the four QSFP56 legs runs 100GBASE-CR2 at 100G using two 50G PAM-4 lanes.

Datasheet

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