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According to IDC, the VoIP market is projected to grow at 50% per annum on a conservative basis for the next five years. By 2005 over 20% of all calls will occur over the Internet or corporate intranets. Gateways that can transmit voices over a company's otherwise data-only IP networks are expected to serve as precursors for translation software that will send voice, fax, and video over the Internet.

Tabla de contenidos provista por Syndetics

• Preface(p. xvii)
• Acknowledgments(p. xix)
• Chapter 1. Introduction(p. 1)
• 1-1 Overview(p. 2)
• 1-2 Rationale(p. 4)
• Classical Data over Voice Constraints(p. 4)
• Advantages of Voice over Data Networking(p. 6)
• 1-3 Potential Problems to Consider(p. 10)
• Reliability(p. 10)
• Predictability(p. 11)
• Security(p. 13)
• Regulatory Considerations(p. 16)
• Standards(p. 18)
• 1-4 Applications(p. 19)
• Document Conferencing(p. 19)
• Help Desk Access(p. 20)
• Integrated Call Management(p. 20)
• Order Placement(p. 21)
• Unified Messaging(p. 22)
• 1-5 Technological Success(p. 23)
• Circuit Switching versus Packet Switching(p. 23)
• The Rosetta Stone of Delay(p. 24)
• 1-6 Topic Preview(p. 25)
• The Internet Protocol(p. 25)
• Frame Relay(p. 26)
• Voice Basics(p. 26)
• Telephone Operations(p. 26)
• Voice over IP(p. 27)
• Voice over Frame Relay(p. 27)
• Management(p. 27)
• Chapter 2. IP and Related Protocols(p. 29)
• 2-1 The TCP/IP Family(p. 30)
• The OSI Reference Model(p. 31)
• The TCP/IP Protocol Family(p. 35)
• Transport Protocol Overview(p. 38)
• 2-2 The Internet Protocol(p. 41)
• The IP Header(p. 42)
• IP Addressing(p. 45)
• 2-3 TCP and UDP Headers(p. 69)
• The TCP Header(p. 70)
• The UDP Header(p. 72)
• Firewall and Router Considerations(p. 73)
• 2-4 RTP, RSVP, and H.323(p. 74)
• RTP(p. 74)
• RSVP(p. 80)
• The H.323 Standard(p. 82)
• Chapter 3. Frame Relay(p. 87)
• 3-1 Overview(p. 88)
• X.25 Network Delay Constraints(p. 88)
• Fiber-optic-based Backbones(p. 89)
• Comparison to X.25(p. 89)
• Protocol Stack Operation(p. 89)
• 3-2 Evolution and Standardization(p. 93)
• LAP-D(p. 94)
• Bell Labs and ANSI Standards(p. 94)
• The Frame Relay Forum(p. 94)
• 3-3 Frame Relay Operations(p. 97)
• Frame Formats(p. 97)
• 3-4 Cost of Use(p. 110)
• Cost Components(p. 110)
• Chapter 4. Understanding Volce(p. 115)
• 4-1 Basic Properties of Speech(p. 116)
• Classes of Speech(p. 117)
• 4-2 Waveform Coding(p. 120)
• Pulse Code Modulation(p. 121)
• Digital Speech Interpolation(p. 131)
• 4-3 Vocoding(p. 131)
• Operation(p. 132)
• Types of Vocoders(p. 133)
• 4-4 Hybrid Coding(p. 134)
• Regular Pulse Excited Coding(p. 135)
• Code Excited Linear Predictor Coders(p. 136)
• 4-5 Algorithm Selection(p. 140)
• Chapter 5. Telephone Operations(p. 143)
• 5-1 Signaling(p. 144)
• Types(p. 144)
• 5-2 Initiating a Telephone Call(p. 145)
• The Telephone Connection(p. 145)
• The Telephone Set(p. 146)
• The Local Loop(p. 148)
• 5-3 Signaling Methods(p. 150)
• Types of Signaling(p. 150)
• Trunk Signaling(p. 153)
• 5-4 PBX Interface Considerations(p. 164)
• Chapter 6. Voice over IP Networking(p. 165)
• 6-1 Internet Telephony versus Telephony over the Internet(p. 167)
• Internet Telephony(p. 167)
• Internet Telephony Operations(p. 172)
• 6-2 Telephony over the Internet(p. 188)
• LAN Traffic Constraints(p. 189)
• Equipment Examination(p. 190)
• 6-3 IP over ATM(p. 202)
• Overview(p. 203)
• IP Datagram Considerations(p. 203)
• ATM Classes of Service(p. 204)
• Ingress Considerations(p. 206)
• Economics(p. 207)
• Chapter 7. Voice over Frame Relay(p. 209)
• 7-1 Technological Issues(p. 210)
• Frame Length Handling(p. 211)
• Fragmentation(p. 215)
• Frame Prioritization(p. 216)
• Frame Loss Handling(p. 217)
• Echo Cancellation(p. 218)
• Frame Delay Handling(p. 219)
• Silence Suppression(p. 220)
• Voice-Compression Method(p. 220)
• Telephony Signaling(p. 221)
• Multiplexing Technique Used(p. 222)
• Frame Relay over ATM(p. 223)
• 7-2 Equipment Operation and Utilization(p. 227)
• ACT Networks(p. 227)
• Memotec(p. 233)
• Nuera Communications(p. 235)
• Feature Checklist(p. 241)
• 7-3 The Frame Relay Forum VoFR IA(p. 242)
• Overview(p. 243)
• Subframes(p. 243)
• Conformance Issues(p. 246)
• For Further Reference(p. 246)
• Chapter 8. Management Issues(p. 249)
• 8-1 Using TCP/IP Applications(p. 250)
• PING(p. 250)
• TRACEROUTE(p. 256)
• 8-2 Traffic Prioritization Considerations(p. 259)
• Shared versus Switched Operations(p. 259)
• Ingress Operations(p. 260)
• Egress Operations(p. 260)
• Summary(p. 260)
• Appendix A(p. 261)
• Appendix B(p. 309)
• Glossary(p. 317)
• Index(p. 333)

Notas de autor provistas por Syndetics

Gil Held is an award winning author and lecturer who specializes in the application of computer and communications technology. He is the author of more than 40 books covering personal computers and data communications. Mr. Held was selected by Federal Computer World as one of the top 100 persons in government, industry, and academia who have made a difference in the acquisition and use of computer systems.