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This document provides an overview of Synchronous Digital Hierarchy (SDH) represented in images.
There are no specific prerequisites for this document.
This document is not restricted to specific software and hardware versions.
Refer to Cisco Technical Tips Conventions for more information on document conventions.
These sections provide an overview of SDH in graphical format.
This diagram shows what an SDH link looks like.
sdh_28327a.gif
This diagram shows the Synchronous Transport Module level 1 (STM1) frame structure.
sdh_28327b.gif
This diagram shows what the STM1 Section Overhead (SOH) looks like.
sdh_28327c.gif
This diagram looks at VC4 Concatenation.
sdh_28327d.gif
This diagram displays the SDH hierarchy.
sdh_28327e.gif
This diagram shows how SDH maintenance interactions look.
sdh_28327f.gif
This table looks at what the alarms mean and their detection criteria.
sdh_28327g.gif
These diagrams provide a description of all the bytes from STM1 SOH, High Order Path Overhead (HO-POH) and Low Order Path Overhead (LO-POH).
sdh_28327i.gif
sdh_28327j.gif
sdh_28327k.gif
sdh_28327l.gif
sdh_28327m.gif
sdh_28327o.gif
sdh_28327p.gif
sdh_28327q.gif
sdh_28327r.gif
sdh_28327s.gif
sdh_28327t.gif
| Revision | Publish Date | Comments |
|---|---|---|
1.0 |
01-Oct-2006
|
Initial Release |