6. VoIP Summary

A VoIP software architecture has been described for the interworking of legacy telephony systems and packet networks. Some of the key features enabling this application to function successfully are as follows:

an approach that minimizes the effects of delay on voice quality
an adaptive playout to minimize the effect of jitter
features that address lost-packet compensation, clock synchronization, and echo cancellation
a flexible DSP system architecture that manages multiple channels per single DSP

Carrying VoIP networks provides the most bandwidth-efficient method of integrating these divergent technologies. While the challenges to this integration are substantial, the potential savings make the investment in a quality implementation compelling.

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TABLE OF CONTENTS:
Definition and Overview
1 VoIP Applications
2 VoIP QoS Issues
3 VoIP–Embedded Software Architecture
4 Voice Packet Module
5 Signaling, Protocol and Management Modules
6 VoIP Summary
7 FoIP Applications
8 PSTN Fax-Call Procedure
9 FoIP QoS
10 FoIP Software Architecture
11 FoIP Summary
Self-Test
Correct Answers
Glossary
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