Data Access Arrangement

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本文介绍了公共交换电话网络中数据接入装置(DAA)的概念及其作用。DAA是指在客户侧网络接口用于数据传输目的的单一设备或设备组，包括所有可能影响接口特性的设备。文章还解释了数据电路终止设备(DCE)的作用，并指出DAA是为公众电话网络设计的所有调制解调器的重要组成部分。

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From Wikipedia, the free encyclopedia

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The term data access arrangement (DAA) has the following meanings:

In public switched telephone networks , a single item or group of items at the customer side of the network interface for data transmission purposes, including all equipment that may affect the characteristics of the interface.
A data circuit -terminating equipment (DCE ) supplied or approved by a common carrier that permits a DCE or data terminal equipment (DTE ) to be attached to the common carrier network.

Data access arrangements are an integral part of all modems built for the public telephone network. In view of mixed voice and data access, DAAs are more generally referred to as Direct Access Arrangements.

Reference

This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" .

External links

Wireline DAA - introductory slides by 3am Systems
Direct-Access Arrangements Are Crucial To Successful Embedded-Modem Designs - in-depth article by Jeff Sorensen