The CCTV bandwidth calculator estimates the aggregate CCTV bandwidth generated by a group of cameras based on the selected resolution, frame rate, codec and bitrate. The calculated bandwidth is then compared against common Ethernet link speeds, providing an indication of network utilisation for each connection type.
Network bandwidth is a fundamental consideration when designing modern IP CCTV systems. Every camera continuously generates network traffic, and the combined bandwidth of all devices must be supported by the network infrastructure without creating congestion, excessive latency or packet loss.
The results are intended to support high-level network planning and infrastructure sizing during the early stages of system design. They should be considered alongside the wider network architecture, expected client viewing traffic, recording server communications and any additional services sharing the same network infrastructure.
How the CCTV Bandwidth Calculator Works
The calculator estimates the bandwidth generated by each camera before combining the results to determine the total network traffic produced by the system.
The calculation considers:
- Camera quantity
- Image resolution
- Frame rate
- Video codec
- Average bitrate
- Expected scene activity
The resulting aggregate bandwidth is then compared with standard Ethernet link capacities to show the approximate utilisation of each connection.
Engineering Guidance
Although CCTV bandwidth calculations appear straightforward, actual network traffic can vary depending on the manufacturer, compression algorithms, scene complexity, image settings and recording configuration.
When designing larger or business-critical systems, engineers should also consider:
- Live client viewing traffic
- Recording server communications
- Video exports and investigations
- Failover and redundant network paths
- Additional security devices sharing the network
- Future system expansion
- Network resilience and availability
These factors should be incorporated into the overall network design rather than relying solely on camera traffic calculations.