VoIP Voice and Fax Signal Processing

CONTENTS

Acknowledgments

About the Author

Preface

Glossary

1 PSTN Basic Infrastructure, Interfaces, and Signals

1.1 PSTN CO and DLC

1.1.1 Analog CO

1.1.2 Digital CO and DLC

1.2 PSTN User Interfaces

1.2.1 FXS and FXO Analog Interfaces

1.2.2 SLAC, CODEC and codec–Clarifications on Naming Conventions

1.2.3 TIP-RING, Off-Hook, On-Hook, and POTS Clarifications

1.2.4 ISDN Interface

1.2.5 T1/E1 Family Digital Interface

1.3 Data Services on Telephone Lines

1.3.1 DSL Basics

1.4 Power Levels and Digital Quantization for G.711 μ/A-Law

1.4.1 μ-Law Power Levels and Quantization

1.4.2 A-Law Power Levels and Quantization

1.5 Significance of Power Levels on Listening

1.6 TR-57, IEEE-743, and TIA Standards Overview

1.6.1 TR-57 Transmission Tests

1.6.2 IEEE STD-743–Based Tests

1.6.3 Summary on Association of TR-57, IEEE, and TIA Standards

2 VoIP Overview and Infrastructure

2.1 PSTN and VoIP

2.1.1 CPE and Naming Clarifications of VoIP Systems in this Book

2.1.2 VoIP End-User Call Combinations

2.2 Typical VoIP Deployment Example

2.3 Network and Acoustic Interfaces for VoIP

2.4 VoIP Systems Working Principles

2.4.1 VoIP Adapter

2.4.2 Voice Flow in the VoIP Adapter

2.4.3 Voice and Fax Software on VoIP Adapter

2.4.4 Residential Gateway

2.4.5 Residential Gateway Example

2.4.6 IP Phones

2.4.7 Wireless LAN-Based IP Phone

2.4.8 VoIP Soft Phones on PC

2.4.9 VoIP-to-PSTN Gateway

2.4.10 IP PBX Adapter

2.4.11 Hosting Long-Distance VoIP through PSTN

2.4.12 Subscribed VoIP Services

2.5 VoIP Signaling

2.5.1 VoIP–H.323 ...