ISDN在S1240程控交换机中的实现

ＩＳＤＮ在Ｓ１２４０程控交换机中的实现鲁明，王文东随着综合业务数字网（ＩＳＤＮ）在我国的逐步使用，如北京ＩＳＤＮ试验网的功能测试，上海浦东Ｓ１２４０ＩＳＤＮ交换机准备应用，ＩＳＤＮ业务也将在全国逐渐推广。本文对窄带ＩＳＤＮ在新一代Ｓ１２４０（７版本）...     

ISDN在S1240中实现

通过分析综合业务数字网（ＩＳＤＮ）的定义，接口，业务和终端标准，讨论了在Ｓ１２４０Ｊ系列机上帝现窄带ＩＳＤＮ的方案，提出了建设我国ＩＳＤＮ的初步建议。     

ZXJ10交换机的ISDN功能

ＺＸＪ１０交换机的ＩＳＤＮ功能图１ＩＳＤＮ用户—网络接口的业务接入点１引言ＩＳＤＮ（综合业务数字网）经过２０多年的研究，最近几年已经进入了全面推广应用阶段。在我国，“七五”期间的ＩＳＤＮ模型网和“八五”期间的ＩＳＤＮ试验网为ＩＳＤＮ的发展作了有益的探...     

关于我国ISDN发展战略

本文简要地分析了国外ＩＳＤＮ市场走势，简述了国内外对ＩＳＤＮ的开发及应用情况，介绍了Ｂ－ＩＳＤＮ的基本特点与业务内容，指出了实现Ｂ－ＩＳＤＮ的关键技术，最后就我国如何开发ＩＳＤＮ提出了建议。     

建设ISDN应注意的几个技术问题

为了提供多种信息，许多发达国家早就在搞综合业务数字网（ＩＳＤＮ）了。先是窄带的Ｎ—ＩＳＤＮ，进而是宽带的Ｂ—ＩＳＤＮ。预计到２０００年前后，Ｂ—ＩＳＤＮ将正式投入应用。我国对于ＩＳＤＮ也很重视，计划到２０１０年要实现相当规模的Ｂ－ＩＳＤＮ。建设ＩＳＤＮ，有很多技术问题，本文只对几个主要的，例如参考结构、ＩＳＤＮ的信今、ＡＴＭ（异步传送模式）及ＩＳＤＮ与各方面的配合作简要介绍。     

商用综合业务数字网在中国起步

本文介绍了我国对综合数字网（ＩＳＤＮ）的需求和目前我国实施ＩＳＤＮ的网络装备基础；描述了我国ＩＳＤＮ的实施方案以及ＩＳＤＮ的业务应用。     

浅谈北京电话局N-ISDN发展的几个问题

Ｎ－ＩＳＤＮ是一项具有广阔发展前景的业务。在分析了Ｎ－ＩＳＤＮ的现状后，对如何做好Ｎ－ＩＳＤＮ的业务发展工作，提出了一系列措施。     

综合业务数字网技术讲座

综合业务数字网技术讲座赵慧玲（邮电部电信传输研究所）第五章ＩＳＤＮ设备ＩＳＤＮ设备指ＩＳＤＮ网为用户提供ＩＳ－ＤＮ业务所需要的各类设备，包括ＩＳＤＮ交换机、ＩＳＤＮ用户交换机、网络终端。接入单元和各类ＩＳＤＮ终端及终端适配器。５］ＩＳＤＮ交换机ＩＳＤ...     

国外开展ISDN业务的市场策略

１．ＩＳＤＮ业务发展的优势ＩＳＤＮ已成为传送话音、数据、图像等综合业务的主要手段之一。从市场趋势来看，用户线持续增长，产品品种增多，价格降低，ＩＳＤＮ产品、网络和业务收入增加，市场份额提高。这些优势产生于市场的驱动：ＩＳＤＮ业务可用性提高，覆盖面扩大。随着业务可用性的增加，用户可用性随之提高，许多国家可开出的ＩＳＤＮ电路比例达到１００％；ＩＳＤＮ需求的增长。ＩＳＤＮ需求的增长并非来自电话、数据库存取等传统应用，多媒体技术的发展和广泛应用极大地推动了对ＩＳＤＮ业务的需求，如多媒体桌面办公系统就是通…     

公共信道No.7信号的发展—ISDN UP

介绍了ＩＳＤＮ向用户提供的业务种类，综合业务数字网用户部分（ＩＳＤＮ ＵＰ）的功能，ＩＳＤＮ ＵＰ目前所能支持的业务以及ＩＳＤＮ ＵＰ信号信息和格式。     

ISDN Implementation Stategy of the Deutsche Bundespost--From the ISDN Pilot Project to Commercial Services

The first section of this paper defines the Deutsche Bundespost concept of ISDN, the services to be integrated, and the various ISDN components. The second and third parts of the paper cover the ISDN Pilot project and the offering of commercial ISDN services in the Federal Republic of Germany. The implementation strategy is briefly shown together with some outlook of the integration of broad-band services into ISDN. The last part describes strategic development toward an integrated services universal network, offering all kinds of telecommunication services including individual communication as well as broadcast services such as radio and TV program distribution.     

Current role and future evolution of the ISDN Signaling system inNTT's network

The current role of the integrated services digital network (ISDN) Signaling System is examined, covering general features of the ISDN protocol, functionalities supporting ISDN services, and functionalities supporting existing services. The Signaling System No.7 (SS7) network and its operation are described. The future evolution of the ISDN signaling system is discussed     

ISDN standardization

The history and achievements of ISDN (integrated services digital network) standardization in the CCITT are reviewed. Two of the most important developments, ISDN basic and supplementary services and broadband ISDN, are focused upon. The underlying concepts in the discussions of ISDN standardization are briefly explained     

ISDN Terminals and Integrated Services Delivery

This paper proposes that the end user's perception of an "ISDN service" should reflect'three interrelated ISDN aspects, namely:bulletISDN terminal capabilities,bulletISDN access capabilities, andbulletISDN network capabilities. Emphasis is placed on the ISDN terminal capabilities in supporting integrated services delivery of different levels to the end user (e.g., integrated bearer services and integrated teleservices delivery). Such a concept, integrated services delivery, is seen to suggest a useful framework for developing a wide range of possible ISDN commercial service/ product offerings. An ISDN service scenario is also described to illustrate some important communication capabilities made possible by an ISDN environment.     

Support of Existing Data Interfaces by the ISDN

During the past decade, the opportunity has arisen to economically combine data and voice services onto a single system, the integrated services digital network (ISDN). Studies in CCITT have led to the production of a set of Recommendations covering aspects of the ISDN, including the customer terminal interface. Inevitably, there are significant differences between the customer terminal interfaces recommended for dedicated data networks and that proposed for the ISDN. To ensure a smooth transition towards the introduction of ISDN based services, the CCITT have published recommendations describing how existing terminal interface designs may be connected to an ISDN. These recommendations are the subject of this paper.     

ISDN applications at Tenneco Gas

The evolution from analog to integrated services digital network (ISDN) telecommunication services at Tenneco Gas and the features of its telephone system are described. The results of implementing ISDN in data operations are examined. The benefits of ISDN for Tenneco are briefly summarized     

适配于ISDN的综合业务局域网设计

现有ＬＡＮ的传输能力在很大程度上可满足传输综合业务的要求，现有ＬＡＮ适配于ＩＳＤＮ的直接方法是在ＬＡＮ上实现ＩＳＤＮ功能，从而达到ＬＡＮ工作站与ＩＳＤＮ间业务的完全互通，在ＬＡＮ上实现ＩＳＤＮ功能的方案是：（１）在ＬＡＮ上增加综合业务传输接口，该接口不同于ＬＡＮ软件提供的接口，具有实时性，而且该接口的设计应使ＬＡＮ应用与综合业务应用间互相独立；（２）开发在工作站上与ＬＡＮ应用软件并发运行的综合业务     

ISDN: a customer perspective

Early projected benefits of the integrated services digital network (ISDN) are evaluated from a customer premises equipment (CPE) perspective. It is argued that economic conditions continue to affect ISDN investment in the USA. Worldwide customer acceptance of ISDN is contrasted with earlier projections and shown to be running at about 25% of earlier projections. IBM's current ISDN product set is discussed briefly. Even though the rollout of services has not yet achieved expectations, IBM believes the potential for ISDN use by customers is significant     

ISDN: a snapshot

A snapshot of the present status of ISDN (integrated services digital network) is presented in terms of standardization efforts, field trials and demonstrations, implementations and services, and equipment and devices. A review of opinions and controversies as well as future trends is also given. The authors emphasize the importance of the worldwide standardization effort and discuss the organizations that are responsible for establishing such standards. It is pointed out that, with the limitation and inflexibility of the narrowband ISDN and the broadband ISDN, issues for higher-rate services have become prominent. For broadband services, the problem is not merely increasing the speed of the operation. It affects the compatibility of switching technology, the workability of the local loop arrangement, the availability of rate adaption, and the efficiency of bandwidth utilization. Although some basic principles of narrowband ISDN can be carried to broadband ISDN, the technology is quite different. For example, the interconnection and transmission problems of video, HDTV, (high-definition television), and high-speed data are different from those of voice. Thus, the standard 64-kb/s B channel itself, the fundamental rate of ISDN transmission, appears inadequate for wideband services. At present, the solution is to establish the multiples of 64 kb/s for accommodation of broadband or higher rates     

Switching System Software Design for ISDN

The ISDN offers various services through multipurpose digital subscriber lines. The switching program for the ISDN should be so designed as to realize the control of various voice and nonvoice services and provide for developing service enhancement. To attain the goal, the ISDN services are classified hierarchically and each category is allocated to appropriate network nodes for implementation. As a result, the local switching program provides an out-slot subscriber line signaling capability and call connection with appropriate compatibility checking including a check for access capability to communications processing nodes. The switching program modules specific to analog services and those specific to digital services are separated to allow the use of the existing program file and to afford easy program design and maintenance. Remote-controlled switching is a suitable means for an economical introduction of the ISDN services to low traffic density areas. Special routing and reliability arrangements as well as the program structure for a remote-controlled switch are discussed.