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IEEE802.3ab协议尺度
Type1000BASE-TPCS,type1000BASE-TPMAsublayer,andtype1000BASE-TMediumDependentInterface(MDI)aredefined.Thissupplementprovidesfullyfunctional,electricalandmechanicalspecificationsforthetype1000BASE-TPCS,PMA,andMDI.Thissupplementalsospecifiesthebasebandmediumusedwith1000BASE-T.