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CHAPTER

1-1

Cisco IP Telephony Network Design Guide

78-11103-03

Introduction

This chapter presents a high-level overview of several basic models that you can

use in designing your IP telephony network. This overview provides some

guidance with respect to when and why a particular design should be selected.

Subsequent chapters delve into each network model in greater detail, beginning

with the simplest model and building to increasingly complexity models.

This chapter includes the following major sections:

• General Design Models, page 1-1

• Single-Site Model, page 1-3

• Multiple Sites with Independent Call Processing, page 1-5

• Multisite IP WAN with Distributed Call Processing, page 1-7

• Multisite IP WAN with Centralized Call Processing, page 1-10

General Design Models

Figure 1-1 provides a composite scenario that illustrates the goals of the network

design models discussed in this guide. This scenario represents what is possible

with Cisco CallManager Release 3.0(5).

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