IEEE 802.3az-2010

IEEE 802.3az-2010 PDF

Clause 14 defines the functional, electrical, and mechanical characteristics of the type 10BASE-T MAU and one specific medium for use with that MAU. This clause also specifies the functional, electrical, and mechanical characteristics of the energy-efficient version of 10BASE-T, the type 10BASE-Te MAU, and one specific medium for use with that MAU. The relationship of this clause to the entire ISO/IEC 8802-3IEEE 802.3 LAN International Standard is shown in Figure 14-1. The purpose of the MAU is to provide a simple, inexpensive, and flexible means of attaching devices to the medium. NOTE—Support for both 10BASE-T and 10BASE-Te signal levels in a single device is not required. This MAU and medium specification is aimed primarily at office applications where twisted-pair cable is often installed. Installation and reconfiguration simplicity is allowed by the type of cable and connectors used. The 10BASE-T specification builds upon Clause 1 through Clause 7 and Clause 9 of this standard. Amendment Standard - Superseded. This amendment to IEEE Std 802.3-2008 specifies changes to several existing physical layers to enable energy-efficient operation of Ethernet. Changes to 10BASE-T include a reduction in transmit voltage requirements. Changes to 100BASE-TX, 1000BASE-T, 10GBASE-T, 1000BASE-KX, 10GBASE-KX4 and 10GBASE-KR include the definition of a Low Power Idle (LPI) mode and mechanisms to communicate and manage the entry and exit into and out of LPI and the operation of this mode. New Link Layer Discovery Protocol (LLDP) TLVs are defined for negotiating system level energy-efficiency parameters.