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Understanding the CAB-AC-ARG= The CAB...
Overview of the CAB-L240-20-Q-N=
The CAB-L240-20-Q-N= is a Cisco-certified coaxial cable engineered for high-frequency signal transmission in wireless, cellular, and industrial networking applications. Featuring N-type connectors, it supports reliable RF communication in environments where signal loss or interference can disrupt operations. This cable is specifically designed for Cisco’s ruggedized routers, small-cell antennas, and IoT gateways requiring precise impedance matching.
Technical Specifications
- Connector Type: N-type (male) on both ends, with 50-ohm impedance for minimal signal reflection.
- Cable Type: Low-loss LMR-240 equivalent, rated for frequencies up to 8 GHz.
- Length: 20 feet (6.1 meters), pre-terminated for quick deployment.
- Shielding: Quad-shield design (foil + braid) for >95% EMI/RFI suppression.
- Durability: UV-resistant polyethylene jacket, operational from -50°C to +85°C.
Why N-type connectors? Their threaded coupling and robust design handle higher power and frequencies than BNC/TNC variants, making them ideal for 5G, Wi-Fi 6, and licensed-band radio systems.
Core Applications
- Cellular Small Cells: Connects Cisco Ultra-Reliable Wireless Backhaul (CURWB) nodes to antennas in dense urban deployments.
- Industrial IoT Gateways: Links Cisco IR8300/IR1100 routers to remote sensors in manufacturing or mining sites.
- Public Safety DAS (Distributed Antenna Systems): Ensures stable signal distribution in stadiums or underground facilities.
Addressing Key User Concerns
Q: Can this cable support 100W RF power output?
Yes, but only up to 3 GHz. Beyond 3 GHz, power handling drops to 50W due to skin effect losses. Always verify equipment specs to avoid overheating.
Q: Is it compatible with third-party antennas?
Yes, provided the antenna has N-type female ports. However, impedance mismatches may occur if paired with 75-ohm cables or devices.
Q: How does it differ from LMR-400 cables?
While LMR-400 offers lower loss at higher frequencies, the CAB-L240-20-Q-N= prioritizes flexibility and weight reduction for easier installation in tight spaces.
Q: Can it be used outdoors permanently?
Yes. The UV-resistant jacket and corrosion-proof connectors are designed for permanent outdoor exposure, including coastal or high-humidity regions.
Sourcing the CAB-L240-20-Q-N=
For deployments demanding certified performance, the “CAB-L240-20-Q-N=” is available here, alongside Cisco’s RF and wireless accessories.
Practical Deployment Insight
In a recent railway communication project, the CAB-L240-20-Q-N= proved critical for maintaining LTE-R signal continuity across tunnels and mountainous terrain. While generic cables initially saved costs, frequent signal drops during testing forced a switch to Cisco’s solution. Its pre-terminated ends eliminated field assembly errors, and the shielding prevented interference from high-voltage tracks. For high-frequency applications, investing in purpose-built cables like this avoids costly retrofits and ensures compliance with FCC/ETSI emission standards. Always factor in both frequency and power requirements—overlooking one can lead to premature cable failure.