1. The power is insufficient, and the power receiving end is fixed: The 802.3af standard (PoE) output power is less than 15.4W, which is sufficient for general IPC, but the output power for high-power front-end devices such as ball machines cannot meet the requirements.

2. Risk concentration: Generally speaking, a PoE switch will supply power to multiple front-end IPCs at the same time. Any failure of the POE power supply module of the switch will cause all cameras to fail to work. The risk is too concentrated.

3. High equipment and maintenance costs: compared with other power supply methods, PoE power supply technology will increase the workload of after-sales maintenance. In the sense of safety and stability, the stability and safety of separate power supply are the best.