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| Preface | |
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| Introduction | |
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| What Is Meant by Carrier-Grade? | |
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| What Is Meant by VoIP? | |
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| A Little about IP | |
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| Why VoIP? | |
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| The VoIP Market | |
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| VoIP Challenges | |
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| Overview of the Following Chapters | |
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| Transporting Voice by Using IP | |
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| Overview of the IP Protocol Suite | |
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| Internet Standards and the Standards Process | |
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| The Internet Protocol (IP) | |
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| The Transmission Control Protocol (TCP) | |
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| The User Datagram Protocol (UDP) | |
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| The Real-Time Transport Protocol (RTP) | |
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| The RTP Control Protocol (RTCP) | |
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| IP Multicast | |
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| IP Version 6 (IPv6) | |
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| Speech-Coding Techniques | |
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| Voice Quality | |
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| A Little about Speech | |
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| Voice Sampling | |
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| Types of Speech Coders | |
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| G.711 | |
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| Adaptive Differential PCM (ADPCM) | |
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| Analysis-by-Synthesis (AbS) Codecs | |
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| Selecting Codecs | |
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| Cascaded Codecs | |
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| Tones, Signals, and Dual-Tone Multifrequency (DTMF) Digits | |
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| H.323 | |
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| The H.323 Architecture | |
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| Overview of H.323 Signaling | |
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| RAS Signaling | |
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| Call Signaling | |
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| Call Scenarios | |
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| H.245 Control Signaling | |
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| Conference Calls | |
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| The Decomposed Gateway | |
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| The Session Initiation Protocol (SIP) | |
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| The Popularity of SIP | |
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| The SIP Architecture | |
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| Overview of SIP Messaging Syntax | |
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| Examples of SIP Message Sequences | |
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| Redirect and Proxy Servers | |
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| The Session Description Protocol (SDP) | |
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| Usage of SDP with SIP | |
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| SIP Extensions and Enhancements | |
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| Usage of SIP for Features and Services | |
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| Interworking | |
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| Summary | |
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| Media Gateway Control and the Softswitch Architecture | |
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| Separation of Media and Call Control | |
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| Softswitch Architecture | |
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| Requirements for Media Gateway Control | |
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| Protocols for Media Gateway Control | |
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| MGCP | |
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| MEGACO/H.248 | |
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| VoIP and SS7 | |
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| The SS7 Protocol Suite | |
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| SS7 Network Architecture | |
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| ISUP | |
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| Performance Requirements for SS7 | |
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| Sigtran | |
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| Interworking SS7 and VoIP Architectures | |
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| Quality of Service (QoS) | |
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| The Need for QoS | |
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| Overview of QoS Solutions | |
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| The Resource Reservation Protocol (RSVP) | |
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| DiffServ | |
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| Multiprotocol Label Switching (MPLS) | |
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| Combining QoS Solutions | |
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| Designing a Voice over IP Network | |
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| Design Criteria | |
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| Product and Vendor Selection | |
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| Traffic Forecasts | |
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| Node Locations and Bandwidth Requirements | |
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| Physical Connectivity | |
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| Table of Erlang B | |
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| Visual Basic Code for Erlang Calculations | |
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| Glossary of Acronyms | |
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| References | |
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| Index | |