​​Defining the CAB-L400-20-N-N=​​

The ​​CAB-L400-20-N-N=​​ is a Cisco-designed cable assembly optimized for extended-distance network deployments. Parsing its naming structure:

• ​​L400​​: Likely denotes a 400-meter length, targeting backbone or campus-wide connectivity.
• ​​20​​: Suggests a 20-gauge wire thickness, balancing flexibility and signal integrity.
• ​​N-N​​: Indicates N-type connectors, known for ruggedness and superior EMI shielding.

This cable is engineered for environments requiring ​​long-range, high-reliability links​​, such as industrial campuses, utility networks, or outdoor Wi-Fi backhauls.

​​Core Technical Specifications​​

• ​​Bandwidth​​: Supports ​​10 Gbps speeds​​ over copper, compliant with Cat6A standards for reduced crosstalk.
• ​​Durability​​: UV-resistant polyethylene jacket and IP67-rated connectors for outdoor or harsh industrial use.
• ​​Compatibility​​: Tailored for Cisco Catalyst IE9300 series switches, industrial routers, and Aironet access points.

​​Why This Cable Stands Out​​

Generic outdoor-rated cables often fail Cisco’s ​​signal-to-noise ratio (SNR) thresholds​​, leading to retransmissions in PoE+ setups. The CAB-L400-20-N-N= is pre-tested for Cisco’s Power over Ethernet (PoE) ecosystems, ensuring stable 90W delivery to devices like PTZ cameras or remote sensors.

​​Procurement Insights​​

While Cisco.com limits direct sales, the CAB-L400-20-N-N= is available through itmall.sale’s Cisco-compatible inventory. Their stock includes factory-sealed and recertified units, validated for outdoor performance.

​​Addressing Key User Questions​​

​​Q: Can it replace fiber in long-distance deployments?​​
A: For ​​sub-500-meter 10GbE runs​​, it’s a cost-effective copper alternative. Beyond that, fiber remains superior for latency and loss.

​​Q: Is it suitable for underground conduit installations?​​
A: Yes—its abrasion-resistant jacket and waterproof connectors withstand moisture and physical stress.

​​Q: Does it support daisy-chaining multiple devices?​​
A: While possible, prioritize Cisco’s recommended topologies to avoid voltage drop over extended spans.

​​Lessons from the Field​​

During a smart grid rollout, a utility provider used off-the-shelf cables for substation links. Within months, salt and humidity corroded connectors, causing data gaps. Switching to the ​​CAB-L400-20-N-N=​​ eliminated outages—proof that in critical infrastructure, every meter of cable must be as robust as the devices it connects. For engineers, this isn’t just a component; it’s the lifeline of resilient networks.