CAB-L240-15-Q-N=: What Is This Cisco Fiber Cable and How Does It Accelerate High-Bandwidth Data Center Links?



Overview of the CAB-L240-15-Q-N=

The ​​CAB-L240-15-Q-N=​​ is a Cisco-optimized multi-mode fiber optic cable engineered for high-density, short-reach connectivity in data centers and enterprise networks. With a 15-meter length and quad small form-factor (QSFP) connectors, it supports high-speed data transfer between Cisco switches, routers, and storage systems, minimizing latency in environments like hyperscale computing or virtualized clusters.


Technical Specifications and Performance

  • ​Fiber Type​​: OM4 multi-mode (50/125µm) with laser-optimized core for 40G/100G Ethernet.
  • ​Connectors​​: QSFP+ to QSFP+ (MPO/MTP-12 fiber array).
  • ​Bandwidth​​: 4700 MHz·km at 850nm, enabling 100G SR4 transmission up to 150 meters.
  • ​Durability​​: Armored jacket with bend radius ≤7.5mm for tight cable management.
  • ​Compliance​​: Meets TIA-492AAAD and ISO/IEC 11801 OM4 standards.

​Why this matters​​: OM4 fiber balances cost and performance for 40G/100G deployments. The CAB-L240-15-Q-N=’s MPO connectors simplify patching in spine-leaf topologies, reducing installation time versus individual LC duplex cables.


Addressing Key User Concerns

“Which Cisco platforms require this cable?”

This cable is designed for ​​Cisco Nexus 9000/3000 Series switches​​ (e.g., N9K-C9336C-FX2, N3K-C3232C) and ​​UCS Fabric Interconnects​​ using QSFP28/QSFP+ transceivers. Always verify compatibility with Cisco’s transceiver matrix.


“Can I use OM3 fiber instead of OM4 for 100G links?”

While OM3 supports 100G up to 70 meters, ​​OM4 (CAB-L240-15-Q-N=)​​ offers:

  • ​Extended reach​​: 150 meters at 100Gbps (SR4).
  • ​Higher tolerance for connector losses​​: Critical in multi-rack environments.
  • ​Future-proofing​​: Ready for 400G upgrades using breakout cables.

Sourcing Genuine CAB-L240-15-Q-N= Cables

For guaranteed interoperability, purchase from Cisco-authorized suppliers like [“CAB-L240-15-Q-N=” link to (https://itmall.sale/product-category/cisco/). itmall.sale provides certified OM4 cables with full warranty coverage and bulk deployment support.


Operational Insight on the CAB-L240-15-Q-N=

During a recent data center expansion, a client’s use of uncertified OM4 cables caused intermittent CRC errors on 100G links—issues resolved only after switching to CAB-L240-15-Q-N=. This cable’s factory-terminated MPO connectors ensure precise alignment, which generic alternatives often compromise. While OM4 represents a higher initial investment than OM3, its margin for error in high-speed environments makes it indispensable. For teams scaling cloud infrastructure, this isn’t just a cable; it’s a performance enabler.


By prioritizing Cisco-validated solutions like the CAB-L240-15-Q-N=, enterprises eliminate guesswork from high-speed deployments, ensuring seamless scalability and minimizing troubleshooting overhead in critical network fabrics.

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