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What is 802.3bt?
The latest IEEE PoE standard, 802.3bt, provides up to 90 W of power onto an Ethernet cable while maintaining backward compatibility with older IEEE PoE standards. As the name implies, PoE injects power onto a cable designed for data without disrupting the high-speed traffic the cable is carrying. Reach Technology PoE5 Testers support the new bt standard and provide engineering and manufacturing a cost-effective, functional testing tool for Power Sourcing Equipment (PSE), including Ethernet switches, Power over HDBaseT (PoH), and LED lighting controllers.
802.3af vs. 802.3at vs. 802.3bt
- 802.3af is known as “PoE” on most switches. It provides up to 15.4W and is mostly used for less powerful wireless access points and IP cameras.
- 802.3at provides more power, up to 30W, and is generally referred to as “PoE+”. The higher amount of power allows higher resolution cameras to be used and PoE switches which are powered up by PoE and provide power downstream, powered by 802.3at on the uplink and 802.3af PoE on other ports.
- 802.3bt is one of the newest standards and provides up to 60W to each device it is referred to as “PoE++”. This is used for really demanding devices, notably lighting products and screens.
What does 802.3 mean?
802.3, or IEEE 802.3, is a working group of standard specifications for Ethernet, a method of packet-based physical communication in a local area network maintained by the Institute of Electrical and Electronics Engineers (IEEE). It defines a physical layer and a data link layer for media access control, or MAC address, for a wired, fast Ethernet network connection. These physical connections are made between nodes or devices such as routers, switches and hubs via copper or fiber cables. In general, IEEE 802.3 standards specify the physical media and the working characteristics of Ethernet. However, there are many variations of this standard used today. Source: TechTarget