POE Switch with Camera Knowledge Explanation

This Article Applies to: All POE switches

Factors to Consider in Monitoring Networking

1. Number of devices: Understanding the network topology and selecting the required switch model based on distribution, the number of ports on the switch becomes our first consideration factor;

2. Device bandwidth: This is mainly considered from two aspects, one is the bandwidth required for accessing the device, and the other is the port rate of the switch. If the total bandwidth of the access device exceeds the port rate, it will cause network congestion, resulting in network or video lag;

3. Power supply equipment: POE switches are required for power supply equipment, and switches need to consider the power supply standards and power supply of power supply equipment. Non standard and excessive power can cause equipment instability or direct power failure;

4. Other factors include network cables, NVRs, and POE splitters.

How to calculate the number of monitoring devices (based on the stream and quantity)

1. Camera stream: Before selecting a switch, it is necessary to first determine how much bandwidth each image occupies.

Generally, a 200W camera is around 8-10M, while a 130W camera is around 4-6M. Specific parameters can be based on the data provided by the device;

2. Number of cameras: Before selecting a switch, we also need to confirm how many cameras the switch needs to have in the network, and whether the switch ports meet the requirements;

give an example:

8-channel 200W pixel camera, stream calculated at 10M, 8 × 10=80M

It is not recommended to fully load the bandwidth of a general switch, and it is recommended to use around 60% -70%. Based on 70% calculation, the bandwidth utilization of the 100M and 1G switch ports is approximately 70M and 700M, respectively. Therefore, based on 8-channel 200W cameras and 10M bit stream calculation, a bandwidth of 80M is required. Therefore, it is recommended to use a 1G switch or a 100M switch with an upstream port of 1G.

Calculated based on 6M bitrate for 130W camera and 10M bitrate for 200W camera;A 100Mbps switch can accommodate approximately 10-12 130W cameras (6X11=66M) and 6-7 200W cameras (7 × 10=70M)

A gigabit switch can support approximately 116 cameras with a power of 130W (6 × 116=696M), and approximately 70 cameras with a power of 200W (70 × 10=700M)