White paper "Remote Powering – Next Generation Power over Ethernet"
Networks in enterprises are growing further and are becoming more versatile and complex. Wireless Access Points (WAPs), safety network cameras, building automation and control systems as well as voice over IP telephony (VoIP) are now vital network components.
The more network devices are added, the more the cabling infrastructure must be designed for this growth. This makes the option of the remote powering of terminal equipment all the more attractive. In recent years, Power over Ethernet (PoE) has established itself as the key technology enabling network administrators, installers and system integrators to handle the integrated supply of terminal equipment with energy and data via structured cabling. The first PoE standard IEEE 802.3af created in 2003 was already designed for powering of terminal equipment with up to 12.95 Watt. The fast-growing need for PoE applications with higher performance made it necessary to renew these standards.
The PoE Plus (PoE+) standard IEEE 802.3at with up to 25.5 Watt on terminal equipment was adopted in 2009. Industry’s need for remote powering at higher levels has been growing ever since. The current new standard IEEE 802.3bt takes this into account and now supplies terminal equipment with up to 90 Watt. As expected, the manufacturers of terminal equipment and PoE supply units already offer non-standardized solutions providing more performance (up to 100 Watt).