Table of Contents - Chapter 33

IP Telephony (VoIP)


33.1 Introduction 499
33.2 The Motivation And Challenge Of IP Telephony 499
33.3 Encoding, Transmission, And Playback 500
33.4 Signaling Systems And Protocols 501
33.5 A Basic IP Telephone System 501
33.6 Interoperation With Other Telephone Systems 502
33.7 Alternative Terminology And Concepts 503
33.7.1 SIP Terminology And Concepts 503
33.7.2 H.323 Terminology And Concepts 504
33.7.3 ISC Terminology And Concepts 504
33.8 Proposed Protocols And Layering 505
33.9 H.323 Characteristics 505
33.10 H.323 Layering 506
33.11 SIP Characteristics And User Identification 507
33.12 SIP Methods 507
33.13 An Example SIP Session 508
33.14 Telephone Number Mapping And Routing 509
33.15 IP Telephones And Electrical Power 509
33.16 Summary 510
Exercises 511