Synchronous Digital Hierarchy

What is Synchronous Digital Hierarchy?

Definition

Synchronous Digital Hierarchy (SDH) is the ITU-TSS International standard for transmitting information over optical fiber.

Keywords

SDH, SONET, OC-3, OC-12, OC-48, OC-128, STM-1, STM-3, STM-12

Synonyms

SDH
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