Support for optionally powering a 10BASE-T,100BASE-TX or 1000BASE-T DTE device via the Power Interface (PI)using physical layers defined in Clauses 14,25,and 40.The Power Sourcing Equipment (PSE)is located at an endpoint or midspan,separate from and between the MDIs,and provides power to the Powered Device (PD)over the Link Section.The PSE detection protocol distinguishes a compatible PD from non-compatible devices and precludes the application of power and possible damage to non-compatible devices.The PSE monitors the Maintain Power Signature (MPS)and removes power when it is no longer requested or required.Optional management function requirements are specified.

Define methodology for the provision of power via balanced cabling to connected Data Terminal Equipment with 802.3 interfaces. The amount of power will be limited by cabling physics and regulatory considerations. Compatibility with existing equipment will be considered.

To provide power for a new class of devices with 802.3 interfaces enabled by progress in silicon technology. These devices are characterized by low power requirements and LAN connectivity.