Shulou(Shulou.com)06/01 Report--

PoE switch is also a switch, but different from ordinary switches, it provides a switch that can supply power. Here is a brief introduction:

Common switch: Common Ethernet switch, only with data transmission switching function.

PoE switch: Different from ordinary switches, PoE switches have PoE power supply functions in addition to the functions of ordinary switches. With this feature, PoE switches can power network devices such as webcams, wireless APs, and Internet phones, eliminating the need for complex power wiring.

Advantages of PoE switches in use

1. Advanced technology. A single network cable can transmit data and power at the same time, which is more advanced than using multiple lines.

2, wiring is convenient. Due to the convenience of wiring, no additional power wiring is required.

3. Cost savings. From an engineering point of view, in medium and large monitoring systems, investment costs can be greatly saved, for example, fewer construction personnel can be hired, fewer wires can be purchased, labor costs and material costs can be reduced, and project duration can be shortened.

4, high safety, because there is no direct strong current power supply and strong current circuit, improve the safety of use.

The following points should be noted when selecting the right PoE switch:

1. Physical port

First of all, it is necessary to determine the number of switch interfaces, fiber ports, network management, speed (10/100/1000M) and other issues. At present, the main interfaces on the market are 4, 8, 16 and 24. Optical fiber port is generally one to two ports, optical port must pay attention to whether it is 100 megabytes or gigabit.

PoE switches are generally used to connect powered terminals and are used as access switches. The number of PoE power supply ports supported by the switch is considered according to the number of powered terminal devices. In addition, it is also necessary to consider the highest rate that the port needs to support according to the power receiving terminal and actual requirements. If the port of the AP is gigabit and uses 11AC or dual band, gigabit access can be considered.

2. Power supply parameters

Select an appropriate switch according to the power supply protocol (such as 802.3af, 802.3at or non-standard PoE) supported by the powered terminal (AP or network camera). The PoE power supply protocol supported by the switch needs to be consistent with that of the powered terminal. Users should pay attention to whether the product is 48V standard PoE power supply, 12/48V fake PoE switch, can not automatically distinguish the voltage required by the power receiving end, easy to happen flashlight equipment is burned out, there is a security threat to life and property.

3. Wiring scheme

Users can compare the cost of wiring for local access to power at the terminal with the cost of powering with a PoE switch. The current PoE switch power supply distance is within 100 meters. No layout restrictions, saving about 50% of the overall cost. Wiring within 100 meters, flexible network expansion without power line layout restrictions, wireless AP, network camera and other terminal equipment hanging on the wall or ceiling, flexible expansion, easy wiring, beautiful and elegant.

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