采用新型VLSI设计的ISDN-PABX

利用新一代PABX来实现一个局部地区范围的话音、数据综合业务网络,是当前ISDN走向实用的一个方面,也是办公自动化(OA)领域的一种可行的选择方案。本文介绍应用于该领域的一种新型综合业务数字PABX。该PABX是一种适用于ISDN的数字交换系统,采用当前国际上最新推出的VLSI芯片设计而成。不仅能完成传统的电话交换。并且能提供数据交换功能,具备2B+D接口,可以实现局部地区范围内计算机数据和话音等业务的综合交换,由于采用了最新的超大规模集成电路芯片,系统结构清晰、电路简单、实现方便。为了提高系统的可靠性、实用性与可维护性,其软、硬件都尽可能采用了模块化、结构化的设计思想。

An ISDN-PABX Designed with the New Type of VLSIs

Using a new generation of digital PABX to realize the integrated voice/data services network in a local area is one of the aspects for ISDN to become practical. It is also a feasible scheme in the field of office automation(OA). A new integrated services digital PABX is introduced in this paper. This PABX, which is designed with the up-to-date VLSI chips in the world and can be used in ISDN environment, can provide not only telephone switching but also data switching and contains 2B+D interfaces. It permits the integrated switching of computer data and voice service within a local area. Due to the use of the up-to-date VLSI chips, the system, with clear structures and simple circuits, is easy to be built. To enhance the reliability, practicality and maintainability of the system, we made the design of software and hardware as much modular and structured as possible.