Ethernet over power lines, or PoE, is a technology that has Ethernet data signals travel over the existing infrastructure of power cables. It’s been in use for close to two decades now and has gone through several different generations of standards. If you’re looking to get into using PoE or are already using it and want to know more about the standards, this article is for you. We’ll be discussing the various Power over the ethernet standards and what they mean for you and your devices.
PoE standards: 802.3af and 802.3at
PoE standards have come a long way since the early days of 802.3af. The latest standard, 802.3at, is much more powerful and efficient than its predecessors. Here’s what you need to know about the different PoE standards.
802.3af was the first PoE standard and it was released in 2003. It allowed for up to 15 watts of power to be delivered over Ethernet cables. This was enough to power devices such as IP phones and wireless access points. However, it wasn’t enough to power more demanding devices such as laptops and flat panel displays.
802.3at was released in 2009 and it increased the maximum power delivery to 30 watts. This made it possible to power devices such as laptops and flat panel displays over Ethernet cables. In addition, 802.3at also introduced new features such as Power over Ethernet Plus (PoE+) which allows for even higher power delivery (up to 60 watts).
The latest PoE standard is 802.3bt which was released in 2018. It increases the maximum power delivery to 90 watts which is enough to power even the most demanding devices such as 4K TVs and high-end gaming laptops.
So, what’s the difference between these three PoE standards? Well, let’s take a closer look at each one…
802.3af: The original PoE standard that provides up to 15 watts of power delivery over Ethernet cables. It’s suitable for powering
The difference between the two standards
The two most popular standards of PoE are IEEE 802.3af and IEEE 802.3at. Both of these standards allow for the delivery of power over Ethernet cabling, but there are some key differences between them.
IEEE 802.3af is the older of the two standards, and it delivers a maximum of 15W of power per port. This is enough to power most small devices, such as phones or access points. However, it is not enough to power larger devices, such as laptops or desktop computers.
IEEE 802.3at is the newer standard, and it delivers a maximum of 30W of power per port. This is enough to power almost any device that can be powered by PoE, including laptops and desktop computers. In addition, IEEE802.3at also supports Power over Ethernet Plus (PoE+), which allows for even higher levels of power delivery (up to 60W per port).
Which standard is right for you?
If you’re looking to deploy Power over Ethernet (PoE) in your office or home, you might be wondering which standard is right for you. The three most common PoE standards are 802.3af, 802.3at, and 802.3bt. Here’s a breakdown of each standard so you can decide which one is right for your needs.
802.3af: The original PoE standard, 802.3af was approved in 2003. It provides up to 15W of power per port and is compatible with a wide range of devices, including IP phones, Wi-Fi access points, and security cameras.
802.3at: Approved in 2009, 802.3at increased the maximum power output to 30W per port. It’s compatible with devices that require more power, such as high-definition security cameras and some wireless access points.
802.3bt: The newest PoE standard, 802.3bt was approved in 2018. It provides up to 60W of power per port and is compatible with a growing number of devices, including 4K security cameras, LED lighting systems, and some laptops.
So, which standard is right for you? If you’re looking to deploy PoE on a budget, 802.3af is a good option since it’s compatible with a wide range of devices. If you need to power devices that
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