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单词 plesiochronous digital hierarchy
释义

Definition of plesiochronous digital hierarchy in English:

plesiochronous digital hierarchy

noun
Electronics

  • A technology for voice communication which uses plesiochronous synchronization; abbreviated PDH.

Origin

1990s; earliest use found in Tutorial: Impact of SONET/SDH on Optical Networks.

Definition of plesiochronous digital hierarchy in US English:

plesiochronous digital hierarchy

noun
Electronics

  • A technology for voice communication which uses plesiochronous synchronization; abbreviated PDH.

Origin

1990s; earliest use found in Tutorial: Impact of SONET/SDH on Optical Networks.
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更新时间：2025/6/20 4:59:39