The EMA system: a CTI based e-mail alerting service

The integration of Internet services and telephony services is a new area for the development of telecommunications services. One example is an e-mail alerting service that uses the telephony network for e-mail notification. The EMA system is a computer telephony integration (CTI) application that checks a user's mailbox on the mail server and informs him/her over the phone when new e-mail arrives, eliminating the need for permanent Internet connection. The EMA system has a Web-based interface, enabling the user to configure service parameters. The EMA system is developed as a distributed and concurrent application. It consists of seven modules: the console, Web interface, Web handler, controller, voice machine, database, and mail checker, using communication solutions based on component object model (COM) technology. This article describes the structure of the EMA system, its implementation, and advantages for users     

ISDN computer-aided telephony

It is argued that ISDN computer-aided telephony requires properly architected platforms to satisfy changing application needs during the 1990s. Proper architecting necessitates the use of functionally rich and consistent telephony application programming interfaces (APIs). Other APIs are also needed to support integrated applications. The coexistence of telephony and other APIs must be accommodated in the ISDN driver architecture to make efficient use of D-channel signaling and voice, data, or image communications on the associated B/H channels. This driver may support Open Systems Interconnection (OSI), Systems Network Architecture (SNA), X.25, or other protocol stacks in the same computer using a single ISDN access link. Applications being currently explored show that significant benefits can be realized using incoming call management and LAN-based image server access by means of ISDN. It is envisioned that by the year 2001, a common API will facilitate multimedia applications on multivendor platforms architected within the OSI framework. These platforms will support interconnections of public and private ISDNs and bridging to BISDNs     

计算机与话音通信集成中的应用程序接口技术

对现有的几类CTAPI的特性和关键技术进行了分析。在此基础上，针对目前国内ATM技术的广泛应用情况，提出了一种基于NativeModeATMAP的CTAPI开发基础，这对于CTI技术应用推广具有现实的意义。     

An introduction to TSAPI and network telephony

Discusses the integration of the telephone into the desktop work environment. This objective can be achieved in a number of different ways. The approach described uses the client-server model. Network telephony is a service that provides the capability to establish, answer, route, and terminate telephone calls under the control of applications on either desktop computers or servers resident in the network. It is accessed by applications via a standard programming interface (telephony services application programming interface, TSAPI) and utilizes a centralized server-based interface with the private branch exchange (PBX) to access the switching and telephone control services that the PBX provides. Creating a logical control link between the application software on the desktop computer and the telephone on the desk eliminates the need to physically connect the telephone to the desktop computer. The author distinguishes between the application programming interface and the network telephony service provider. The author assumes the services are provided by NTS R2.2 release and a PBX-based switching service. However, the author uses the term PBX to include switching services provided by key telephone or hybrid systems, PC-based telephony cards, or other appropriate technologies     

一种可扩展座席应用集成系统的设计

基于呼叫中心开展电子商务应用和服务是移动互联网时代电子商务业务的重要组成部分。为了实现计算机与电话集成（CTI）,呼叫中心的座席系统通常采用Windows系列操作系统的本地应用,而为了适应快速升级和更新的需求,业务系统通常采用基于浏览器的Web应用,因此座席系统与业务系统的集成关系到话务人员的工作效率和客户体验。本文提出了一种易于扩展的座席系统与业务系统的集成设计方案,基于本设计的实施可将不同的业务系统通过后台配置快速集成到指定的座席界面,从而解决了业务系统快速部署与实现和降低集成成本等难点。     

Implementing OSI-based interfaces for network management

Experience acquired in the development of an interface between a fiber optic system and a prototype management system developed using an object-oriented approach is discussed. Open System Interconnection (OSI) implementation concerns, the use of an ASN.1 compiler, and the use of standard application programming interfaces (APIs) are described. The role of the seven-layer OSI stack in exchanging information between managing operating systems and managed network elements is reviewed. The implementation of an OSI stack on a SUN workstation using the UNIX operating system is also described. Methods for passive and active testing of the resulting programs are discussed     

Developing applications for Internet telephony: a case study on the use of parlay call control APIs in SIP networks

Applications offered to end users as value-added services, or more simple, services, are crucial for the survival and success of service providers. Two main sets of standards have emerged for Internet telephony: H.323 from the ITU-T and SIP from the IETF. Unfortunately, the related application development frameworks are rather weak. Parlay, a set of standard object-oriented and signaling protocol-neural APIs, is an alternative. It allows applications to access network functionality, including call control, in a controller manner. Call control makes it possible to establish, modify, and tear down calls. It is the main functionality offered by Internet telephony networks. We have built a call control application in a SIP environment, using the call control APIs offered by Parlay. The application is a multiparty game. This article describes the case study. The mapping of the APIs onto SIP is presented, and its implementation is described. Related work reviewed, and the lessons learned are discussed. Parlay call control APIs are suitable for application development in Internet telephony. However, well isolated extensions are needed to realize their full potential.     

基于CTI技术的调度系统设计与实现

随着电信技术的不断发展,融合了通信和电信技术的CTI技术已经成为目前提供各类新型增值业务的一种重要方式,它为电信业带来了广阔的发展空间和收益.文中重点阐述了CTI技术的基本原理以及它在数字调度系统中的应用,通过分析数字调度系统的各个组成部分以及数字调度系统软件如何实现各坐席间的通信和调度.文中通过采用自上而下的三层体系结构提出了一种可以通过操作平台方便进行信息的交互的数字调度系统的软件设计思想.     

Achieving Programming Model Abstractions for Reconfigurable Computing

This paper introduces hthreads, a unifying programming model for specifying application threads running within a hybrid computer processing unit (CPU)/field-programmable gate-array (FPGA) system. Presently accepted hybrid CPU/FPGA computational models-and access to these computational models via high level languages-focus on programming language extensions to increase accessibility and portability. However, this paper argues that new high-level programming models built on common software abstractions better address these goals. The hthreads system, in general, is unique within the reconfigurable computing community as it includes operating system and middleware layer abstractions that extend across the CPU/FPGA boundary. This enables all platform components to be abstracted into a unified multiprocessor architecture platform. Application programmers can then express their computations using threads specified from a single POSIX threads (pthreads) multithreaded application program and can then compile the threads to either run on the CPU or synthesize them to run within an FPGA. To enable this seamless framework, we have created the hardware thread interface (HWTI) component to provide an abstract, platform-independent compilation target for hardware-resident computations. The HWTI enables the use of standard thread communication and synchronization operations across the software/hardware boundary. Key operating system primitives have been mapped into hardware to provide threads running in both hardware and software uniform access to a set of sub-microsecond, minimal-jitter services. Migrating the operating system into hardware removes the potential bottleneck of routing all system service requests through a central CPU.     

应用于移动e-商务中一种新密码安全体系的分析

本文介绍了一种新的移动终端接入网络实现e -商务技术 ,将应用于桌面终端 ,固定网络接入的密码应用编程接口 ,用于利用PPC和智能手机开发的WindowsCE嵌入式操作系统。文中分析了应用于windows2 0 0 0 /XP密码应用编程接口移植于移动通信的主要技术 ,探讨了应用策略、方法以拓展移动通信新业务     

基于SIP协议的IP电话增值业务实现技术

讨论了SIP协议以及基于SIP协议的IP电话增值业务实现技术 ,并对SIPCGI、CPL、SIPServlets、JAINAPIs等几种SIP编程技术进行了分析与比较 ,归纳总结了开发IP电话增值业务的一般方法     

海上遇险搜救综合通信系统的设计与实现

为了提高我国海上搜救应急反应的调度、指挥能力,利用现代通信、计算机、计算机电信合成(CTI)等技术,实现了海上遇险搜救综合通信系统.该系统采用程控调度交换和无线电台适配的方案,使用无线电台适配器将无线通信转换为有线通信,再通过程控交换机将各级海上搜救中各类卫星、语音电话、视频系统等异构终端综合互联,实现有线通信系统与无线通信系统的无缝连接,从而为值班和搜救指挥人员提供专业、便捷的通信、操作手段,提高指挥判断的准确性和效率.     

基于CTI技术的智能亲情电话系统设计与实现

随着信息产业（IT）的蓬勃发展,计算机电话集成技术CTI及其相关产业得以迅速的发展,并大量应用于社会生活的各个方面。通过深入研究CTI技术,结合射频识别RFID技术、语音转换技术、面向对象的多线程和socket编程技术以及PSTN通信网的应用原理,在VC＋＋6.0平台下构建了一套智能亲情电话管理系统ITMS,实现了狱警对监狱服刑人员拨打电话的便捷管理。该系统已经得以应用,用户反映良好,给监狱的管理带来了极大的方便。     

CTI in the corporate enterprise

The goal of computer telephony integration (CTI) is to present information about the caller on a data screen, while the call is in progress. It has the potential to reduce the cost of customer contact, and improve the quality of customer service. So how, precisely, is this done? © 1998 John Wiley & Sons, Ltd.     

The communicating PC

As the PC entered its second decade of evolution, it started a transformation into a general-purpose communication tool. This article takes a look at a number of established and emerging technologies that contribute to this ongoing transformation of the PC. Although each of these technologies individually is perfectly capable of enabling compelling PC applications in specific market segments, it is their use in combination that potentially supports the most useful real-world communications applications. The ability of an applications program to use seemingly independent technologies in concert is no coincidence, but requires proper upfront consideration and careful design. This article presents technologies and common interfaces promoted by Intel for the Microsoft Windows family of operating systems. Although several alternative solutions exist and are promoted by others, none of them offer the degree of interworking needed to make the “communicating PC” a coherent entity. We start by taking a look at the PC's role in computer telephony integration (CTI) and go on to consider call processing, protocol-independent data transport, simultaneous voice/data communication, unattended PC operation, plug and play CTI peripherals and mainstream implementations     

一种基于Cryptoki应用程序接口的安全应用方案

文章介绍了由RSA实验室制定的Cryptoki应用程序编程接口,随后分析了其接口模型和主要构件,并提供了一个PCMCIA无线加密上网卡的开发实例作为这个Cryptoki的研究背景,Cryptoki为计算机通信系统的安全提供了加解密的基础。     

局域网IP电话系统PSTN网关实现

本提出在企业内部构建基于局域网的IP电话系统的迫切性和技术可行性，并结合目前最新的CTI技术，给出局域网IP电话系统重要组成模块——PSTN网关的一种具体实现方案。     

Distributed network computing over local ATM networks

Communication between processors has long been the bottleneck of distributed network computing. However, recent progress in switch-based high-speed local area networks (LANs) may be changing this situation. Asynchronous transfer mode (ATM) is one of the most widely-accepted and emerging high-speed network standards which can potentially satisfy the communication needs of distributed network computing. We investigate distributed network computing over local ATM networks. We first study the performance characteristics involving end-to-end communication in an environment that includes several types of workstations interconnected via a Fore Systems' ASX-100 ATM switch. We then compare the communication performance of four different application programming interfaces (APIs). The four APIs were Fore Systems' ATM API, the BSD socket programming interface, Sun's remote procedure call (RPC), and the parallel virtual machine (PVM) message passing library. Each API represents distributed programming at a different communication protocol layer. We evaluated two popular distributed applications, parallel matrix multiplication and parallel partial differential equations, over the local ATM network. The experimental results show that network computing is promising over local ATM networks, provided that the higher level protocols, device drivers, and network interfaces are improved     

Internet-Telefonie — Ein Überblick

Voice telephony in the internet is of increasing importance since more than one year. The reason is the availability of powerful voice codecs operating on a personal computer and of new application software products. Interworking Units between the public telephone network and the internet are acelerating this trend. This article is giving an overview of history, technology, standards and future prospects of this new type of voice telephony.     

基于WindowsCE6.0的电话系统设计与实现

WindowsCE6．0H入式操作系统新增了对移动通信更强大的支持。这篇文章实现并优化了基于WindowsCE6．0操作系统、Monahans310处理器、SIM300D芯片的电话系统。不同于通常的直接在应用程序中发送AT命令以实现电话功能,此设计基于RIL架构,屏蔽底层设备硬件细节。这篇文章利用TAPI实现电话功能,并引入电话管理层管理电话系统、封装TSP消息,使上层应用和底层硬件设备完全剥离。采用此方案实现的电话系统功能稳定、可移植性高。