Dear Friends,

Sometime we require something that help us to understand SDH in quick mode.For this I have collected some snapshots that will help you crack your interviews as well as make you loaded with the know hows of the same..

1.SDH frame:-

 2.Mapping structure:-

3.Overheads:-

4.Path Overheads:-

5.Concatenation:-

6.Alarms:-

7.Alarm Flow:-

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