Carrier Grade Voice over IP

Carrier Grade Voice over IP

In 2002 voice over IP will constitute more than 25% of all long distance voice calls, according to Network World. That s more than a 30% ramp-up from 2001. The emergence of SIP, MPLS and new quality of service tools is making carrier grade voice over IP a service reality, and a potentially huge margin booster and revenue driver for service providers.The first edition of Carrier Grade Voice over IP played a roll in VoIP growth, in less than year becoming an essential tool for carriers working to provide high quality IP telephony. This new edition vastly updates the SIP chapter, details MPLS, and takes the explanations of the previous edition a step further in a final chapter that shows, step by step, how to design working VoIP networks.

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Daniel Collins played key roles in the development of 2G wireless systems and the introduction of GSM to North America during nearly a decade of work with Ericsson in the United States and the United Kingdom. Now an independent consultant, he specializes in VoIP and 3G wireless network architectures.

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From the contents:
CHAPTER 1: INTRODUCTION What is Meant by Carrier-Grade? What is Meant by VoIP? A Little About IP Why VoIP? Why Carry Voice? Why Use IP for Voice? Lower Equipment Cost Voice/Data Integration and Advanced Services Potentially Lower Bandwidth Requirements The Widespread Availability of IP The VoIP Market VoIP Challenges Speech Quality Managing Access and Prioritizing Traffic Speech-Coding Techniques Network Reliability and Scalability Overview of the Following Chapters CHAPTER 2: TRANSPORTING VOICE BY USING IP Overview of the IP Protocol Suite Internet Standards and the Standards Process The Internet Society The Internet Architecture Board (IAB) The Internet Engineering Task Force (ETF) The Internet Engineering Steering Group (ESG) The Internet Assigned Numbers Authority (IANA) The Internet Standards Process The Internet Prototol (IP) The IP Header IP Routing The Transmission Control Protocol (TCP) The TCP Header TCP Connections The User Datagram Protocol (UDP) Voice over UDP, not TCP The Real-Time Transport Protocol (RTP) RTP Payload Formats The RTP Header Mixers and Translators The RTP Control Protocol (RTCP) RTCP Sender Report (SR) RTCP Receiver Report (RR) RTCP Source Description Packet (SDES) RTCP BYE Packet Application-Defined RTCP Packet Calculating Round-Trip Time Calculating Jitter Timing of RTCP Packets IP Multicast IP Version 6 (IPv6) IPv6 Header IPv6 Addresses IPv6 Header Extensions Interworking IPv4 and IPv6 CHAPTER 3: SPEECH-CODING TECHNIQUES Voice Quality A Little About Speech Voice Sampling Quantization Types of Speech Coders G.711 Adaptive Differential PCM (ADPCM) Analysis-by-Synthesis (AbS) Codecs G.728 Low-Delay CELP (LD-CELP) G.723.1 Algebraic Code-Excited Linear Prediction (ACELP) G.729 Selecting Codecs Cascaded Codecs Tones, Signals, and Dual-Tone Multifrequency (DTMF) Digits