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CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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Frame Structure of SDH

Frame Structure of SDH

To add or drop low-speed tributary signals to or from high-speed signals, try to distribute tributary signals in the frame equably and regularly. The ITU-T regulates that STM-N frames are rectangular and expressed in bytes, as shown in Figure 15-3.

Figure 15-3  STM-N frame structure

STM-N is the frame with the dimension of 9 rows x 270 x N columns. Here, N is consistent with that in STM-N, indicating how many STM-1 signals are multiplexed to this STM-N signal.

An STM-N frame consists of the following parts:

  • Section Overhead (SOH): includes Regenerator Section Overhead (RSOH) and Multiplex Section Overhead (MSOH).

  • Administration Unit Pointer (AU-PTR): is the pointer that specifies the first byte of the payload. The receiving end can correctly extract the payload according to the location of the pointer.

  • Payload

Updated: 2019-03-06

Document ID: EDOC1100069331

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