DS3s are multiplexed up to higher rates in the same manner. At the higher asynchronous rate, they cannot be accessed without demultiplexing.In a synchronous system, such as SONET, the average frequency of all clocks in the system will be the same (synchronous) or nearly the same (plesio...
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2 : 8 : (PETP)doi:KS C IEC 60249-2-8-2002(2012)该规格规定了可伸缩同入力聚酯(聚氧乙烯酯)(PETP)薄膜特性的要求.
质量审核员资格doi:QJ 2672-1994