基于V5的用户接入系统ISDN接入模块的设计与实现

介绍Ｖ５接入网用户接入系统的ＩＳＤＮ接入模块硬件和软件设计方案。这个方案具有系统配置灵活的特点。另外，此方案主要采用西门子公司的芯片组。     

浅谈几种通讯技术的发展趋势

本人通过对几种通讯技术的发展趋势,分析了其淘汰的一些因素。     

Challenges for policy of network oriented society a Japanese view

Social impacts of digital information networks are described in terms of convergence of service modes, integration of socioeconomic activities, change in industrial structure, strengthening social infrastructure and enrichment of culture, with some reference to specific Japanese situations. Emphasis is placed on such issues as reorganization of regulatory measures, interoperability of systems and services, communities of interest, privacy and security, freedom of information, information resource development, software production, shift of workforce, societal receptivity, preservation and creation of culture, and lowering of language barriers.     

Information infrastructure: Who builds broadband networks?

This paper examines the essential difference between the U.S. and Japan, when one considers information infrastructure. There are seven perception gaps between the U.S. and Japan concerning Information Infrastructure policies. These gaps must be understood in order to compare the countries' governmental policies in this area. In looking at the present circumstances, the essential question to answer concerns who is to build, own and operate the network(s) of the infrastructure. Liberalization is certain to be a central factor in the ongoing telecommunications debates. Now that customers have had a taste of the liberalized market-place, the movement toward more open markets will be difficult to stop. When considering options, it is necessary to pay close attention to standardized network access and the increasingly important role software plays. These issues are causing us to take a new approach to the traditional role played by regulators. They also force a closer look at the appropriate structure of utility companies. This paper addresses the above issues in hopes of stimulating dialog on the new telecommunications infrastructure paradigm.     

ISDN D信道终端—IBOX

文章介绍了一种新型的ISDN终端－能通过D信道收发短消息的IBOX，并从硬件构成和软件实现两个方面对其进行了详细的分析。     

总线结构在ISDN交换机D通道交换中的应用

本文分析了一种为ISDN交换机内部D通道交换而设计的总线交换机制，并详细介绍其FPGA实现。