plesiochronousadj.
/ˌpliːzɪˈɒkrənəs/, U.S. /ˌplisiˈɑkrənəs/ Electronics.
Designating or relating to systems which are operating with clocks that are not perfectly synchronized with each other.
ΚΠ
1974 XXI Congresso Internazionale per l'Elettronica 379 In a plesiochronous multiplexer the amount of jitter which the tributaries can stand before digital errors are introduced in the multiplexing or demultiplexing process is discussed.
1991 Sci. Amer. Oct. 57/3 (advt.) DXC switches for 2 Mb/s, 34 Mb/s, and 140 Mb/s plesiochronous transmission channels, as well as 155 Mb/s synchronous transmission channels.
2002 Electronic Engin. Times (Nexis) 21 Oct. 43 Tau's two-chip set is based on plesiochronous design and supports time-division-multiplexed (TDM) services. Those features are not often found in standard packet-based architectures.
Compounds
plesiochronous digital hierarchy n. a technology for voice communication which uses plesiochronous synchronization; abbreviated PDH.
ΚΠ
1990 Tutorial: Impact of SONET/SDH on Optical Networks 1 in Fifth Vacation School on Optical Fibre Communications (IEE) The problems of the existing Plesiochronous Digital Hierarchy (PDH) and the role that a new generation of SDH equipment building blocks will play in solving them are reviewed.
2003 Electronic Engin. Times (Nexis) 2 June 24 The second is an aggregation and grooming solution for mapping plesiochronous digital hierarchy traffic over Sonet links.
This is a new entry (OED Third Edition, September 2006; most recently modified version published online March 2022).
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adj.1974