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What's the advantages and possible disadvantages of POE for IP cameras?

Judy Du www.mvteamcctv.com 2016-03-10 15:11:49
All MVTEAM IP cameras can support POE function, which is added on the camera cables.
When selecting IP cameras, some customers may wonder whether IP cameras with POE is better, or using power adaptor is better. Here we list the advantages and possible disadvantages of POE for your reference. 
Advantages of PoE:
1. Simple cabling, reduce installation cost
Centralized power supply, one network cable can transmit data and power supply, PoE enables network devices no longer require extra power supply, greatly reduce the installation cost and time.
2. Safe and convenient
Power Sourcing Equipment only provides power supply to PoE-enabled devices. For example, PoE switch only transmit power supply when it detects the connection of PoE-enabled devices. This can avoid the risk of leakage. Users can mix use existing non-PoE device and PoE-enabled devices, both of them can co-exist.
3. Convenient for maintenance
Similar to data transmission, PoE can be managed through Simple Network Management Protocol (SNMP). This function can offer shut down at night, remote reset etc functions.
Simple Network Management Protocol (SNMP) is a popular protocol for network management. It is used for collecting information from, and configuring, network devices, such as servers, printers, hubs, switches, and routers on an Internet Protocol (IP) network.

Possible disadvantages of PoE:
1. Power insufficient, powered device can't boot: 802.3af PoE standard maximum output power is below 15.4W, this is sufficient to provide power supply for most of IP cameras. However, this output power is not sufficient for high power consumption devices such as network PTZ camera.
2. Centralized risk: Generally, a PoE switch connects to multiple IP cameras, if PoE network switch encounters any problems, all IP cameras will stop working.
3. High equipment and maintenance cost: Compared to other power supplying methods, PoE technology increases maintenance workload, when considering security and stability, separate power supply is best.