QSFP+ CX4

CX4 To QSFP+ 4X Cables For InfiniBand

CX4 to QSFP+ 4X cables provide a breakout connection between one CX4 interface and four QSFP+ connections for compatible InfiniBand applications. These cable assemblies are designed for InfiniBand environments using DDR and SDR signaling, providing a practical interconnect for systems that require multiple connections from a single CX4 interface.

Understanding CX4 To QSFP+ 4X Connectivity

A CX4 to QSFP+ 4X cable uses a CX4 connector on one end and four QSFP+ connectors on the other. This breakout arrangement allows one compatible CX4 interface to connect with four separate QSFP+ interfaces.

The configuration is intended for compatible InfiniBand equipment where the connected hardware supports the required breakout architecture. The cable provides a physical interconnect and does not perform protocol conversion.

InfiniBand DDR And SDR Applications

The product shown is specified for InfiniBand applications using DDR and SDR signaling. These InfiniBand generations are used in systems where reliable data communication and low-latency connectivity are required.

The actual operating speed depends on the capabilities of the connected hardware and the InfiniBand configuration. Both the CX4 host interface and QSFP+ endpoints should support the intended signaling mode.

Breakout Cable Architecture

The four QSFP+ branches allow the single CX4 connection to interface with multiple compatible ports. This can simplify physical connectivity in systems where several InfiniBand links need to be routed from a common interface.

A breakout configuration also requires correct port mapping between the host equipment and connected endpoints. The network hardware should support the specific breakout arrangement before deployment.

Connector And Ejector Design

The CX4 connector shown in the product image includes an integrated ejector mechanism. This provides a convenient method for securing and releasing the connector during installation and maintenance.

The QSFP+ connectors provide the four breakout interfaces. Proper connector seating is important for maintaining a stable physical connection during operation.

Signal Integrity Considerations

InfiniBand uses high-speed electrical signaling, making cable construction and connector quality important to reliable communication. Cable length, impedance characteristics, connector transitions, and routing can affect signal performance.

The cable should be routed without sharp bends or excessive mechanical stress. Avoid pulling directly on the cable when disconnecting the assembly, particularly around the connector housings.

Compatibility Considerations

Before deployment, verify that the host device supports a CX4 interface and the intended InfiniBand signaling mode. The connected equipment must also support compatible QSFP+ interfaces and the required breakout configuration.

Physical connector compatibility alone does not guarantee that the complete connection will operate correctly. Port configuration and system support should be confirmed before installation.

Common Applications

  • InfiniBand Networking
  • DDR InfiniBand Systems
  • SDR InfiniBand Systems
  • High Performance Computing
  • Server Interconnects
  • Data Center Networks
  • InfiniBand Switching Systems
  • Multi-Port InfiniBand Connectivity

Installation And Cable Management

Select a cable length appropriate for the distance between the connected equipment. Avoid unnecessary cable slack and maintain organized routing for the four QSFP+ branches.

The cable should be routed away from areas where it could be compressed or exposed to excessive mechanical force. In dense computing environments, organized routing can also improve access to individual QSFP+ connections during maintenance.

Best Practices

Verify the CX4 and QSFP+ interface specifications before installation. Confirm that the equipment supports the intended DDR or SDR InfiniBand configuration and breakout topology.

Fully seat each connector before operating the system. When disconnecting the CX4 end, use the integrated ejector rather than pulling on the cable itself.

FAQ (Frequently Asked Questions)

1. What Is A CX4 To QSFP+ 4X Cable Used For?
It connects one compatible CX4 interface to four QSFP+ interfaces for supported InfiniBand applications.

2. Does This Cable Support DDR And SDR InfiniBand?
The product is specified for InfiniBand applications using DDR and SDR signaling.

3. How Many QSFP+ Connections Does The Cable Provide?
The breakout assembly provides four QSFP+ connections from one CX4 interface.

4. Are CX4 And QSFP+ Interfaces Directly Interchangeable?
No. The cable provides a specific breakout configuration, and the connected equipment must support the required interface and InfiniBand configuration.

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