• 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 CAB-Q-Q-1M-Arista | 40G QSFP+ Transceiver, Passive DAC Cable, 1m

CAB-Q-Q-1M-Arista

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Description

The Arista CAB-Q-Q-1M is a 1-meter 40GBASE-CR4 passive direct attach copper twinax cable designed for high-speed data center connectivity. This cost-effective cable provides QSFP+ to QSFP+ connections at 40 Gbps, ideal for short-distance rack-to-rack or top-of-rack switch connections. Compliant with IEEE 802.3ba and QSFP+ MSA standards, it delivers reliable low-latency performance in demanding network environments.

Features

Passive copper twinax design for low power consumption and cost efficiency
- Hot-pluggable QSFP+ form factor for easy installation and maintenance
- Four independent data transmission channels supporting 40GBASE-CR4
- Low-latency copper medium for high-performance applications
- Factory pre-programmed EEPROM for seamless network integration
- Compliant with IEEE 802.3ba Ethernet and QSFP+ MSA standards
- RoHS compliant for environmental safety
- Suitable for top-of-rack and middle-of-row switch architectures
- Wide operating temperature range for standard data center environments
- Tested and validated for interoperability with Arista networking platforms

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+ to QSFP+ passive direct attach copper cable
- Data Rate: 40 Gbps (40GBASE-CR4)
- Cable Length: 1 meter
- Cable Type: Twinax copper cable, 30AWG
- Connectors: QSFP+ on both ends
- Power Consumption: Maximum 1.5W per connector
- Supply Voltage: 3.3V
- Operating Temperature: 0°C to 70°C (32°F to 158°F)
- Compliance: IEEE 802.3ba, QSFP+ MSA (SFF-8436), RoHS
- Application: 40 Gigabit Ethernet point-to-point connections

FAQs

Q: What is the maximum reach of the CAB-Q-Q-1M cable?
A: This passive DAC cable is designed for 1-meter connections, suitable for within-rack or adjacent rack connectivity in data centers. For longer distances beyond 3 meters, active optical cables or fiber transceivers are recommended.

Q: Is this cable compatible with other vendor equipment?
A: While designed for Arista switches and routers with QSFP+ ports, this cable follows industry standard specifications (IEEE 802.3ba and QSFP+ MSA). Third-party compatible versions are available that work with multi-vendor environments including Cisco, Juniper, and Dell equipment.

Q: Can this cable be used for 4x10G breakout connections?
A: No, the CAB-Q-Q-1M is a QSFP+ to QSFP+ cable for 40G to 40G connections only. For 40G to 4x10G breakout applications, you would need a CAB-Q-S-series cable that connects QSFP+ to four SFP+ connectors.

Q: What is the advantage of using a passive DAC cable versus fiber optics?
A: Passive DAC cables offer a more cost-effective solution for short-distance connections, requiring no additional transceivers and consuming less power. They provide reliable 40 Gbps connectivity with lower latency, making them ideal for intra-rack and adjacent rack applications within data centers.

Q: Does this cable require any special configuration on Arista switches?
A: No special configuration is required. The cable is pre-programmed with the necessary EEPROM data and is automatically recognized by compatible Arista switches when inserted into QSFP+ ports. The interface will auto-negotiate to 40GBASE-CR4 operation.

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