Core Purpose of the CBL-RSASR1B-240-D=

The ​​CBL-RSASR1B-240-D=​​ is a ​​pre-terminated, high-speed fiber optic cable​​ engineered by Cisco for data center and enterprise backbone applications. Designed to support ​​40Gbps and 100Gbps​​ connectivity, it features ​​OM4 Multi-Mode Fiber (MMF)​​ with ​​LC duplex connectors​​, enabling reliable data transmission over ​​240 meters​​. Its plug-and-play design eliminates field termination, reducing installation errors and downtime in mission-critical environments.

Technical Specifications

• ​​Fiber Type​​: ​​OM4 MMF​​ (850 nm wavelength), optimized for high-bandwidth, short-to-medium-reach deployments.
• ​​Data Rate​​: Supports ​​40Gbps (QSFP+) and 100Gbps (QSFP28)​​ via Cisco Nexus 9000 series switches.
• ​​Cable Length​​: ​​240 meters​​, maximizing reach while minimizing signal attenuation.
• ​​Durability​​: Reinforced jacket for bend resistance and crush protection in dense cable trays.

Addressing Common User Concerns

​​Q: Is the CBL-RSASR1B-240-D= compatible with older Cisco switches?​​
A: While optimized for ​​Nexus 9300/9500 platforms​​, it works with any Cisco switch supporting QSFP+/QSFP28 transceivers. For legacy devices like Nexus 7000, verify transceiver compatibility using Cisco’s ​​Hardware Compatibility Matrix​​.

​​Q: Can this cable be used in direct-attach (DAC) configurations?​​
A: No. Unlike DACs, the CBL-RSASR1B-240-D= requires ​​separate transceivers​​ at both ends but offers superior flexibility for longer distances.

Key Deployment Scenarios

• ​​Data Center Interconnects​​: Links spine-leaf tiers with high-speed, low-latency OM4 performance.
• ​​Cloud Infrastructure​​: Connects hyperconverged nodes and storage arrays in private/hybrid clouds.
• ​​High-Performance Computing (HPC)​​: Supports rapid data transfer between GPU clusters and servers.

Sourcing and Cost Considerations

For enterprises seeking Cisco-certified cabling, the ​​CBL-RSASR1B-240-D= is available through itmall.sale’s data center solutions​​. This supplier offers tested new and refurbished options, providing significant savings without compromising performance or warranty coverage.

Practical Insight

Deploying this cable in a financial data center migration underscored its value in maintaining ​​sub-millisecond latency​​ across 200-meter server-to-switch links. The pre-terminated LC connectors saved hours of labor during rack upgrades, while OM4’s tolerance for tight bends prevented cable damage in congested pathways. Always label cables clearly and document polarity mappings to streamline troubleshooting in large-scale deployments.