SDH

What is SDH ?

The acronym SDH stands for Synchronous Digital Hierarchy and refers to a multiplex technology used in telecommunications.

uSynchronous digital hierarchy (SDH) is an international technology standard that utilizes light-emitting diodes (LED) or lasers for synchronous optical fiber communication.

uSDH was developed to eliminate synchronization issues and replace the plesiochronous digital hierarchy (PDH) system for bulk telephone and data exchange.

 

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