文档介绍：IEEE Std ™-2003
(Amendment to IEEE Std ™-2002,
including IEEE Std ™-2002)
IEEE Standard for Information technology—
munications and information exchange between systems—
Local and metropolitan works—
Specific requirements
Part 3: Carrier Sense Multiple Access with
Collision Detection (CSMA/CD) Access Method
and Physical Layer Specifications
Amendment: Data Terminal Equipment (DTE)
Power via Media Dependent Interface (MDI)
puter Society
Sponsored by the
LAN/MAN mittee
EEE Standards
IEEE Standards
I
Published by
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Print: SH95132
18 June 2003 PDF: SS95132
IEEE Std ™-2003
(Amendment to IEEE Std ™-2002,
including IEEE Std ™-2002)
IEEE Standard for Information technology—
munications and information exchange between systems—
Local and metropolitan works—
Specific requirements
Part 3: Carrier Sense Multiple Access with
Collision Detection (CSMA/CD) Access Method
and Physical Layer Specifications
Amendment: Data Terminal Equipment (DTE)
Power via Media Dependent Interface (MDI)
Sponsor
LAN/MAN mittee
of the
puter Society
Approved 12 June 2003
IEEE-SA Standards Board
Abstract: 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 patible PD from patible devices and precludes the application
of power and possible damage to patible devices. The PSE monitors the Maintain Power
Signature (MPS) and removes power when it is no longer requested or required. Optional manage-
ment function requirements are specified.
Keywords: , Lin