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CHAPTER

5-1

Cisco IP Telephony Network Design Guide

78-11103-03

Dial Plan Architecture and

Configuration

This chapter discusses the architecture and operation of the Cisco CallManager

dial plan and provides design recommendations. A dial plan is essentially a

telephony system interface that allows users to reach each other easily by dialing

strings that can be routed to diverse locations by the system.

This chapter contains the following major sections:

• Cisco CallManager Dial Plan Architecture, page 5-1

• Special Dial String Considerations, page 5-10

• Configuring Dial Plan Groups and Calling Restrictions, page 5-14

• Dial Plan Guidelines and Configuration, page 5-18

• The Role of a Gatekeeper, page 5-21

Cisco CallManager Dial Plan Architecture

This section gives an explanation of the dial plan architecture and functional

components. Since a dial plan can be configured in many ways, recommended

configurations are also described.

Dial plan requirements can include support for abbreviated dialing, such as four-

or five-digit extensions, as well as redundant paths that are transparent to the

calling party. The dial plan in Cisco CallManager Release 3.0 is enhanced to

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 109