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section overhead (SOH)

The Section Overhead (SOH) is represented by the first nine bytes of each of the nine lines of a Synchronous Transfer Mode (STM) transmission frame in the first hierarchy level (STM-1) within the Synchronous Digital Hierarchy (SDH).

Functions of the Section Overhead (SOH) in the STM data frame

Functions of the Section Overhead (SOH) in the STM data frame

The information contained therein ensures the transport of the SDH user data between two node computers of an SDH network. A distinction is made between the Regenerator Section Overhead (RSOH) and the Multiplex Section Overhead (MSOH), whereby an MSOH can be divided into several RSOHs.

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Englisch: section overhead - SOH
Updated at: 16.03.2008
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