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设计并实现了一种ＡＴＭ用户接入设备，它由恒定比特率业务适配模块、以太网业务适配模块、控制／管理模块和线路模块组成，各模块通过共享总线相连．它能提供Ｅ１电路仿真接口、ＲＳ４２２接口、模拟二线电话接口、ＲＪ４５以太网接口，支持话音、视频、数据等多种业务．通过测试，证明现有终端和网络可通过它提供的接口实现经ＡＴＭ网的互连互通．
An ATM user access device is designed and implemented. It consists of a constant bit rate service adaptation module, an Ethernet service adaptation module, a control / management module and a line module. Each module is connected by a shared bus. It can provide E1 circuit simulation interface, RS422 interface, analog two-wire telephone interface, RJ45 Ethernet interface, support for voice, video, data and other services. The test proves that the existing terminal and the network can be interconnected via the ATM network through the interface provided by it.