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Interoperation Configuration Guide

AR Router

This document provides cases for connecting AR enterprise routers to devices of other vendors.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Overview

Overview

The Integrated Services Digital Network (ISDN) evolves from the Integrated Digital Network (IDN), provides end-to-end digital connections, and supports a wide range of services, including voice, high-speed fax, video phone, intelligent telegraph, and teletext services.

A BRI interface is an ISDN interface, and supports two data channels and one signaling channel. The data channel (channel B) with the bandwidth of 64 kbit/s can carry voice or data services, and the signaling channel (channel D) with the bandwidth of 16 kbit/s transmits signaling of the ISDN. That is, the bandwidth of a BRI interface is 144 kbit/s (sum of bandwidths of two data channels and one signaling channel).

A BRA trunk is a digital circuit trunk that supports calls over a maximum of two channels. A BRA trunk group implements voice communication between PBX users and inter-office users.

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Updated: 2019-05-17

Document ID: EDOC1100034005

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