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第三章物理媒体关联子层(PMD)规范第一节PMD子层规范概述一、PMD规范的范围物理层主要保证信号传输的可靠性和有效性,至于信号到什么地方去以及信号去干什么都不是物理层所关心的事情。
Chapter 3 Physical Media Association Sublayer (PMD) Specification Section 1 PMD Sublayer Specification Overview First, the scope of the PMD specification The physical layer to ensure the reliability and effectiveness of signal transmission, as to where the signal goes and what the signal go Not a matter of concern to the physical layer.