What is the POE capability of a switch?

Many friends more on what is Poe Switch memory Switch Poe feature is not very well understood, the following system is introduced.

What is Poe?

Power over Ethernet (PoE) is an IEEE 802.3AF standard powered technology approved in June 2003 that uses the existing network Class 5 (CAT-5) data cable to transmit a DC power supply that transmits the signal while transmitting the power to an electrical device (PD), such as a wireless AP, IP phones and webcams, etc., eliminating the local power supply. In a Poe system, a device that supplies power to PD is called a power supply device (PSE).

The main power supply characteristics of the Poe system are (in the case of the 802.3AF standard):

1) voltage between 44~57v, typical value is 48V.

2) Maximum allowable current is 550mA and the maximum starting current is 500mA.

3) Typical operating current is 10~350ma, overload detection current is 350~500ma.

4) under no-load conditions, the maximum required current is 5mA.

5) provide the PD terminal with 3.84~12.95w Five levels of power request, maximum no more than 13W.

Why use Poe Technology

Wireless APs, IP phones and network cameras and other terminal equipment are usually numerous, location special, the difficulty of taking power, the implementation of its deployment not only consumes manpower and material resources, increase the construction of the network costs, and delay the building time. Poe technology, through remote power supply, eliminates the problem of installing separate power supplies on each end device, making it unnecessary to deploy a separate power supply system for the equipment in the field, which can greatly reduce the cabling and management costs of the deployed end devices, and promote the development and operation of the related fields.

Poe can install and migrate end devices at the best possible performance, without being confined to existing AC power sockets, simplifying cable management during installation and any future network changes. This is especially important for devices such as wireless APs, which can be installed in difficult-to-reach places, such as ceilings or corridors, to achieve the widest range of coverage. Poe's centralized power supply with SNMP management enhances system reliability and protects against power overload, drop-off, surges, and spikes.

Application Fields of Poe Technology

Wireless APs, IP phones, webcams and other terminal equipment, the power demand is generally not more than 13W, which is currently the most important areas of Poe equipment applications. Poe technology solves the problem that the wireless AP is difficult to power the ceiling ventilation layer, the problem of the IP phone due to accidental power outage, the network camera needs to obtain the power supply from the outside, and through the Poe device's own QoS, VLAN, ACL and other functions, to meet the network priority allocation, delay, jitter, Requirements for security, data isolation, and more.

In addition to traditional applications, Poe devices also have large applications in security, building control, retail, entertainment and other emerging markets such as Poe smoke detectors, POS information terminals, PTZ cameras, and even WiMAX base stations. By supporting the IEEE 802.3AF Standard and the IEEE 802.3at standard, Poe devices can support larger port power for greater application prospects.

Which brand of Poe switch is good?

Poe switching has many advantages and is widely used, but it is also critical to choose a reliable Poe switch. One of the most popular Fengrunda Poe switches, with a high-quality, reliable, and highly respected 10-year focus on Poe, all Poe-powered products fully meet the IEEE802.3AF/3AT standard, Support IEEE802.3AF full load power supply, adopt high performance power supply scheme, improve power utilization and reduce system power consumption.

The Fengrunda Poe switch includes 4, 8, 16, 24, which provide intelligent power management functions, including port power configuration, Equipment power priority configuration, enable/disable port power supply, Power overload protection, overtemperature protection, professional anti-thunder, etc., users can flexibly manage Poe devices, inquire device status, Accurately distributes the power required by the equipment and automatically adjusts the power provided to the equipment.

Product Advantages: Only with a network cable at the same time transmission of data and current, output power by the Poe chip control, automatic adjustment, adaptation equipment, and the use of simple, flexible networking, easy installation, cost-effective. In the absence of a power outlet, a network cable can solve all problems, Poe technology and the support of the device, not to find a power outlet and compromise and worry.

Summarize

Poe technology is easy to install, easy to manage, simple, security, stability, scalability and the old principle, in the home application, wireless network, security protection, property management, retail, entertainment and RFID and other fields, has a huge application prospects, and promote the development of related fields.

This article from "Fengrunda Technology" blog, declined reprint!

What is the POE capability of a switch?