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词汇 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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