This page is still under construction.
On request from the newsgroup news:comp.dcom.sdh-sonet
an overview of the overhead bytes in SDH and SONET compared:

SDH versus SONET

shows the commonalities and differences.

On this page the relation between the ITU-T standards and regional standards, i.e. European ETSI and American ANSI, are shown:

ITU-T <-> ETSI <-> ANSI

more later....

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