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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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Multiplexing units

SDH contains basic multiplexing units, including container (C-n), virtual container (VC-n), tributary unit (TU-n), tributary unit group (TUG-n), administrative unit (AU-n), and administrative unit group (AUG-n). Here, n stands for the number of the unit level.


It is used to carry service signals that are transmitted at different rates. G.709 defines specifications for five types of standard containers: C-11, C-12, C-2, C-3, and C-4.


It is used to support connections between channel layers of the SDH and is an information terminal of SDH channels. VCs are classified into lower-order VCs and higher-order VCs. VC-3 in AU-3 and VC-4 are higher-order VCs.

TU and TUG

TU provides adaptation between lower-order and higher-order path layers. One TU or a set of multiple TUs, occupying a fixed position in the payload of the higher-order VC, is called a TUG.

AU and AUG

AU provides adaptation between higher-order channel layer and multiplex section layer. One AU and a set of multiple AUs, occupying a fixed position in the payload of STM-N, is called an AUG.

Updated: 2019-03-06

Document ID: EDOC1100069331

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