The world of technology is constantly changing, and with that comes new standards. One such standard that has been gaining traction in recent years is Power over Ethernet, or PoE. In this blog post, we will explore what PoE standards are and what they mean for the future of technology. We will also touch on the different types of PoE standards and how they differ from one another. By the end of this post, you should have a good understanding of PoE and what it could mean for you and your business.
What is Power over Ethernet?
Power over Ethernet (PoE) is a technology for supplying power to devices over an Ethernet cable. PoE allows devices to be powered without the need for an external power source, making it ideal for devices that are difficult or expensive to reach with a power supply.
PoE standards define the ways in which power can be delivered over Ethernet cables. The most common standard is IEEE 802.3af, which defines how to deliver up to 15 watts of power over an Ethernet cable. Other standards include IEEE 802.3at, which defines how to deliver up to 30 watts of power, and IEEE 802.3bt, which defines how to deliver up to 90 watts of power.
When choosing a PoE standard, it is important to consider the devices that will be powered and the distance between the power source and the device. For example, IEEE 802.3af is sufficient for powering most small devices, such as IP phones or wireless access points, but would not be sufficient for powering larger devices, such as video cameras.
The Different Types of PoE
There are three different types of PoE standards: 802.3af, 802.3at, and 802.3bt.
802.3af is the original PoE standard, ratified in 2003. It provides up to 15 watts of power per port, and is compatible with a wide range of devices including IP phones, WiFi access points, and security cameras.
802.3at is an updated version of the 802.3af standard, ratified in 2009. It provides up to 30 watts of power per port, and is compatible with a wider range of devices including laptops and video surveillance cameras.
802.3bt is the latest PoE standard, ratified in 2018. It provides up to 60 watts of power per port, and is compatible with a wide range of devices including high-powered Ethernet switches and industrial equipment.
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Advantages and Disadvantages of PoE
When it comes to choosing a Power over Ethernet (PoE) standard for your business, it’s important to understand the advantages and disadvantages of each one. PoE+ offers more power than the earlier 802.3af standard, but it also requires compatible equipment. The newest 802.3at standard can provide even more power, but it isn’t compatible with all devices.
PoE+: Advantages
The biggest advantage of PoE+ is that it can provide up to 25.5 watts of power per port, which is enough to power devices such as VoIP phones, wireless access points, and security cameras. This is a significant increase from the 15.4 watts that 802.3af can provide.
PoE+: Disadvantages
One disadvantage of PoE+ is that it isn’t compatible with all devices. In order to take advantage of the increased power provided by PoE+, you need equipment that is specifically designed for it. Another downside of PoE+ is that it requires special cables and connectors that aren’t always easy to find.
802.3at: Advantages
The biggest advantage of 802.3at is that it can provide up to 30 watts of power per port, which is enough to power devices such as laptops, LCD monitors, and PTZ cameras. This is a significant increase from the 25.5 watts that PoE+ can provide.
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Conclusion
In conclusion, understanding PoE standards is important for anyone working with Ethernet cabling. The standards determine the amount of power that can be safely transmitted through the cables, and failure to adhere to them could result in damage to equipment or even fires. With that said, keeping up with the latest standards is also important, as they are constantly being updated to reflect the needs of newer devices. Thankfully, there are plenty of resources available online that can help you stay up-to-date on the latest PoE standards.
