Monitoring camera POE power supply is good, or centralized power supply good?
With the POE-powered switch and the exchange of the difference between the exchange is enough to buy the power of the! POE power supply is a relatively high demand for the switch, the second is extremely unstable, but also increase the post-sale probability!
The use of transformer front-end power take advantage, do not have to consider the line loss, because there are transformers can reduce the loss of lightning to the lowest (of course, lightning B is not guaranteed, are force majeure; unless there is a special contract), after-sales fault detection, Check the problem is out of the camera or power problems, with the lights of the transformer is a glance!
If you have to use (see profits, you understand), it is recommended to choose some big brands of products, such as Huawei, 3com, etc., the cost is high, 20 meters if the use of oxygen-free copper feet .5 super five twisted pair , The loss on the wire can be ignored, but the use of POE power supply to consider the lightning ah, a break is a big string ah! :) POE to be used to do lightning protection measures Oh. And POE power supply in the event of failure when the investigation than the use of some trouble with the transformer.
