802.3at-2009 IEEE Standard for Information Technology--Part 3: CSMA/CD Access Method and Physical Layer Specifications - Amendment 3: Data Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements. This amendment is to augment the capabilities of the IEEE Std 802.3 with higher power levels and improved power management information. It will augment the methodology for the provision of power via balanced cabling to connected Data Terminal Equipment with IEEE 802.3 interfaces. Optional augmented power limit will be made available for certain structured cabling systems. Compatibility with existing equipment will be maintained. http://grouper.ieee.org/groups/802/3/ Amendment of IEEE Std 802.3-2008 Price: Member and Affiliate Price: $77.00 Non-Member Price: $99.00 Part Number: STD95959 Format: PDF Pages: 141 Standard Number: 802.3at-2009 Publication Date: 30/10/2009