But itвЂ™s not enough for technology like flat screen displays, LED lighting, or retail POS terminals. ThatвЂ™s sufficient power for devices such as VoIP phones, wireless access points, and security cameras. The updated IEEE 802.3at-2009 PoE standard, also known as PoE+ or PoE plus, allows for up to 30 W of power to Type 2 devices. The original IEEE 802.3af-2003 PoE standard provides up to 15.4 W of DC power on each port. Electricity has a low frequency of 60 Hz or less, and data transmissions have frequencies that can range from 10 million to 100 million Hz. ThatвЂ™s because electricity and data are transported at opposite ends of the frequency spectrum. When the same pairs are used for both power and data, the power and data transmissions donвЂ™t interfere with each other. With the new PoE standards, power and data are both sent over all four twisted pairs. First PoE standards use two twisted pairs to transmit data, while the remaining two pairs are used for power transmission. Ethernet cable that meets CATx standards consists of four twisted pairs of cable, and PoE sends power over these pairs to PoE-enabled devices.

However, the limiting factor has always been power. These and other benefits have led to a sharp increase in PoEвЂ™s popularity in recent years.

ItвЂ™s also flexible, especially for remote applications, since it doesnвЂ™t require a nearby electrical outlet. Because you donвЂ™t need to run electrical wiring, PoE saves money in materials and installation time. Power over Ethernet delivers electrical power to PoE-enabled devices using your CATx network cables. Power over Ethernet (PoE) Explained: PoE Standards, Types and Power Levels What Is PoE in Networking?

2 pair lan cable