Definitions for "Synchronous Digital Hierarchy"
Keywords:  sdh, sonet, itu, multiplexing, mbps
The international standard for transmitting digital information over optical networks. Term used by ITU to refer to SONET.
the ITU–T–defined world standard of transmission whose base transmission level is 52 Mbps (STM–0) and is equivalent to SONET's STS–1 or OC–1 transmission rate; SDH standards w
The international form of SONET. Often used synonymously with SONET, but not exactly the same. SDH is built on fundamental building blocks of 155.520 Mbps.