TAILIEUCHUNG - Thực hiện tiếng nói qua IP (P1)

Implementation of real-time telephone-quality voice2 transmission using the Internet protocol (IP, the Internet Engineering Task Force’s [IETF’s] request for comment [RFC] 2460 and RFC 791) is no longer as challenging a task as it was a few years ago [1,2]. In this introductory chapter, I define the instances and interfaces of both public switched telephone networks (PSTN) and corporate or enterprise communication networks where voice over IP (VoIP) can be implemented. The goals of VoIP implementation are to achieve (a) significant savings in network maintenance and operations costs and (b) rapid rollout of new services. . | Implementing Voice over IP. Bhumip Khasnabish Copyright 2003 John Wiley Sons Inc. ISBN 0-471-21666-6 1 BACKGROUND AND INTRODUCTION1 Implementation of real-time telephone-quality voice2 transmission using the Internet protocol IP the Internet Engineering Task Force s IETF s request for comment RFC 2460 and RFC 791 is no longer as challenging a task as it was a few years ago 1 2 . In this introductory chapter I define the instances and interfaces of both public switched telephone networks PSTN and corporate or enterprise communication networks where voice over IP VoIP can be implemented. The goals of VoIP implementation are to achieve a significant savings in network maintenance and operations costs and b rapid rollout of new services. The objective is to utilize open flexible and distributed implementation of PSTN-type services using IP-based signaling routing protocol and interface technologies. To achieve this it is necessary to change the mindset of those responsible for the design and operations of traditional voice services networks. Furthermore one has to be ready to face the challenging problems of achieving reliability availability quality of service QoS and security up to the levels that are equivalent to those of the PSTN networks. I discuss two paradigms for implementing the VoIP service in the next section and then present a few scenarios in which VoIP-based telephone service can be achieved for both residential and enterprise customers. A functionally layered architecture is then presented that can be utilized to facilitate the separation of call control media adaptation and applications and feature hosts. Finally I describe the organization of the rest of the book. 1 The ideas and viewpoints presented here belong solely to Bhumip Khasnabish Massachusetts USA. 2 300 to 3400 Hz or KHz of analog speech signal. 1 2 BACKGROUND AND INTRODUCTION THE PARADIGMS The following two paradigms are most prevalent for implementation of the VoIP service Server .

• Kĩ thuật Viễn thông
• Tiếng nói qua IP
• giao thức Internet
• điện thoại chuyển mạch
• mạng lưới truyền thông
• Voice over IP
• Configuring Voice over IP
• the Cisco 3600 Series
• To configure Voice over IP
• Multilink PPP
• telephone call
• telecommunication engineering
• tổng quan về IP
• công nghệ thông tin
• mạng máy tính
• gọi điện thoại bằng IP
• Certification exam
• Internetworking
• manage network
• Network Protocols
• Security communication
• Felix 3
• Beginner’s Guide
• SharePoint 2010
• Packet Guide to Voice over IP
• Bruce Hartpence
• cisco exam
• Cisco CallManager
• Switching
• management network
• Voice Over
• Data Design
• VoIP
• dịch vụ điện thoại IP
• điện thoại IP
• dịch vụ VoIP
• Talker echo
• Voice coding
• algorithm standardization
• Packet overhead
• transport circuit
• media gateway
• tin học
• internet
• design
• network
• LINUX
• computer network
• microsoft office
• mạng
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• quản trị mạng
• công nghệ thông tin
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• tổng quan về voip
• các kiểu kết nối sử dụng
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• các định nghĩa liên quan đến voip
• giải pháp hội nghị truyền hình
• dịch vụ dùng Voice over IP
• giao tiếp điện thoại
• quản trị mạng hệ thống
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