13/04/2026
CCTV System – Design, Network & Site Reality
Most people think CCTV is just cameras…
But in reality, it’s a network-based surveillance system that requires proper design, calculation, and compliance.
System Flow
Camera → PoE Switch → Core Switch → NVR → Server / Monitoring
Every video stream depends on network, storage & configuration
Camera Types (Application-Based)
• Dome → Indoor / offices
• Bullet → Outdoor / perimeter
• PTZ → Large area monitoring
• ANPR → Entry/exit vehicle tracking
• Panoramic / Fisheye → Wide coverage
• Thermal → Low light / critical zones
Network & Infrastructure
• CAT6 / CAT6A cables (up to 90–100m)
• Fiber optic for long distance
• RJ45 connectors & proper termination
• PoE switches (power + data)
• Core switch for distribution
• NVR with 42U rack setup
Engineering Considerations
• Bandwidth calculation (per camera load)
• Storage sizing (retention days)
• Proper switch load distribution
• Network redundancy (if critical system)
Real Site Challenges
• Blind spots due to poor planning
• Wrong camera angle / height
• Cable damage during finishing
• Network overload on single switch
• Storage full = no recording
Important Note
This post is for educational and conceptual understanding only.
Actual system design and implementation must comply with relevant standards, codes, and project specifications (such as NFPA, IBC, and local authority requirements).
Key Insight
CCTV is not about installing cameras…
It’s about design, network reliability, and ex*****on
Let’s Discuss
What’s the biggest issue you’ve faced in CCTV systems on site?
