manoj bhatia james peters jonathan (14 risultati)

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Softcover. Condizione: gut. Auflage: 2Rev ed. (10. August 2006). Providing an introduction to the basics of Voice over IP, this book explains how a basic IP telephony infrastructure is built and works on concepts concerning voice and data networking, and transmission of voice over data networks. It also explains enterprise and service-provider applications and services. A systematic approach to understanding the basics of voice over IP Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks Learn the various caveats of converging voice and data networks Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7) Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP. Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS). Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking. The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services. The authors of Voice over IP Fundamentals--three packet-voice specialists at Cisco Systems--initiate their exploration of next-generation technologies for supporting conversations across large distances: the switched telephone network as implemented on large (intercontinental) and small (building and enterprise) scales. They then point out problems with the old way of doing things and illuminate the standards and regulatory conditions that have made Internet telephony attractive. Signaling System 7 (SS7) gets particularly insightful coverage, with ample graphical support for the clear, fact-rich, example-laden prose. The authors do a great service for readers by breaking packet telephony into its component technologies and explaining each one carefully. Coverage of the various protocols that enable voice over IP, particularly H.323 and Session Initiation Protocol (SIP), is simultaneously clear and deep. The same goes for media gateway protocols and various schemes for translating sounds into digital signals and back again, while retaining maximum clarity. There's even some practical material; concluding chapters diagram Cisco router configurations for voice traffic and flesh out solutions with case studies. You'll like this book if you need to implement a voice over IP system and know more about IP than you do about traditional voice telecommunications. The patient and detailed explanations of traditional telephony concepts and voice over IP protocols will mesh nicely with your existing data communications knowledge, enabling you to make wise design and product decisions. --David Wall Covered topics: The Public Switched Telephone Network (PSTN), signaling specifications (including Bell System, ISDN, and Signaling System 7), the basics of Internet Protocol (IP), modulation and compression of voice, Quality of Service (QoS), H.323, Session Initiation Protocol (SIP), and gateway protocols. Business considerations of Internet telephony are also addressed. Jon and James have a conversational writing style that was easy to follow for me. They have included a lot of historical information that should help the reader understand the momentum behind the transition that is taking place today, creating a "new-world" model of internetworking that has its own rules. As previously mentioned, this is not a design and implementation guide - the forthcoming Cisco Press title "Cisco Voice Integration" will be when it is released. This book does, however, give the reader a very detailed introduction to the underlying technologies that make Voice over IP, Voice over Frame Relay, and Voice over ATM work. The book was a good read even for someone like myself with over 12 years in telephony and networking. Jon and James have done a good job of collecting and communicating relevant information about each of the VoIP building blocks. Content: Introduction Part I PSTN Chapter 1 Overview of the PSTN and Comparisons to Voice over IP The Beginning of the PSTN Understanding PSTN Basics Analog and Digital Signaling Digital Voice Signals Local Loops, Trunks, and Interswitch Communication PSTN Signaling PSTN Services and Applications PSTN Numbering Plans Drivers Behind the Convergence Between Voice and Data Networking Drawbacks to the PSTN Packet Telephony Network Drivers Standards-Based Packet Infrastructure Layer Open Call-Control Layer VoIP Call-Control Protocols Open S.

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paperback. Condizione: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Pub Date: December 2012 Pages: 292 in Publisher: People's Posts and Telecommunications Press VoIP technology architecture (2nd edition. revision). explained the establishment of a basic telephony architecture and work on voice and data networking The main concepts in data networks to transmit voice and IP telephone system interconnect signaling protocol. By reading this book. the reader can understand the enterprise and the public telephone network. the relevant knowledge of IP networking and voice transmission in IP networks; learning data voice network integration of various considerations; verify basic VoIP signaling protocols (H.323. MGCPH .248. SIP) and existing major voice signaling protocols (ISDN. C7SS7); explore VoIP how to achieve more effective and more widely on the existing telephone system;-depth study of the jitter. latency. packet loss . encoding. VoIP QoS tools and safety topics. VoIP technology architecture (2nd edition revised edition) available need to understand how to use the IP network to transfer data. the reader is referred to. will be very helpful for voice. data experts. VoIP technology architecture (2nd edition. revision) for network administrators. software engineers and other readers interested in this technology introduced the knowledge required to understand the VoIP network. Contents: Chapter 1 the PSTN overview and comparison with VOIP 1.1 PSTN origin 1.2 PSTN foundation 1.2.1 Analog and Digital Signal 1.2.2 digital voice signal 1.2.3 local loop. trunks. as well as inter-switch communication 1.2.4 PSTN signaling 1.3 PSTN 1.5.1 open standards-based the packet architecture layer 1.5.2 1.5.3 VOIP call control protocol. call control layer. the driving force of the driving force 1.5 1.4 services and applications of voice and data networks into one packet telephony network 1.5.4 Open Service 1.7 Summary of Chapter 2 of the application layer 1.6 PSTN network architecture model enterprise phone 2.1 PSTN signaling processing 2.2.1 and 2.2 PSTN ET similarities with ET at 2.2.2 Enhancements 2.3 PSTN and ET interconnected generic way 2.3.1 PSTN network 2.3.2 private ET ET Network 2.4 Summary 3.1 signaling Overview Chapter 3 Basic telephone signaling 3.1.1 Analog and digital signaling 3.1.3 with 3.1.2 DC signaling and with signaling 3.1.4 loop start and ground start signaling 3.1.5 CAS CCS3.2 E & M signaling 3.2.1 3.2.2 class 3.2.3 3.2.4 class 3.2.5 3.3 CAS3.3.1 Bell System MF signaling 3.3.2 CCITT No.5 signaling 3.3.3 R3.3.4 R3.4 ISDN3.4.1 ISDN services 3.4.2 ISDN access interface 3.4.3 ISDN L2 and L3 protocol 3.4.4 Basic an ISDN call 3.5 QSIG3.5.1 QSIG the Services 3.5.2 QSIG architecture and reference point 3.5.3 QSIG protocol stack 3.6 DPNSS3.7 Summary Chapter 4 Signaling System No. 7 4.1 SS7 signaling element 4.1.2 of architecture 4.1.1 letter link agreement Overview 4.2 SS7 the 4.2.1 physical the layer - MTP L4.2.2 data layers - MTP L4.2.3 network layer - MTP4 .2.4 SCCP4.2.5 TUP4.2.6 ISUP4.2.7 TCAP4.2.8 TCAP interface 4.3 SS7 example 4.3.1 Basic call set-up and dismantling the Example 4.3.2 800 database query example 4.4 SS7 specification 4.5 Summary of Chapter 5 of the Public Switched Telephone Network (PSTN) service 5.1 Plain Old Telephone Service 5.1.1 custom calling service the 5.1.2 custom local signaling the business 5.1.3 Voice Mail 5.2 Business Business 5.2.1 5.2.2 exchange line through a virtual private voice network call center business 5.3 business 5.2.3 ISP business 5.3.1 5.3.2 Operator business database business 5.4 Summary Chapter 6 IP Technical Guide 6.1 OSI Reference Model 6.1.1 Application Layer 6.1.2 shows the session layer layer 6.1.3 6.1.4 Network Layer Transport Layer 6.1.5 6.1.6 6.1.7 physical layer. data link layer. 6.2 Internet Protocol 6.3 Data Link 6.5.3 BGP6.5.4 IS-layer address 6.4 IP address distance-vector routing 6.5 Routing protocol 6.5.1 6.5.2 link-state routing IS6.

paperback. Condizione: New. Language:Chinese.Paperback. Publisher: People Post.