Gateways and Gatekeepers

This book will help you understand the roles of IP voice gateways and gatekeepers and how to integrate them into your voice network.

Gateways can be configured with many different features and functions and can become quite complex. It is important for network engineers to understand gateway functions, be able to choose when to use which, and be able to configure their gateways. Engineers need a thorough understanding of gatekeeper function and configuration to ensure proper call flow. In addition, they must address issues of security and redundancy.

This chapter provides an overview of the basic building blocks of a Voice over IP (VoIP) network. It includes information on the following:

  • Voice gateways, H.323 gatekeepers, and IP-to-IP gateways
  • IP voice signaling and media protocols
  • Call control devices

It also includes an overview of the network used in case studies throughout the book.

Part I: Voice Gateways and Gatekeepers

Gateways and Gatekeepers

Part II: Gateways

Media Gateway Control Protocol


Session Initiation Protocol

Circuit Options

Connecting to the PSTN

Connecting to PBXs

Connecting to an IP WAN

Dial Plans

Digit Manipulation

Influencing Path Selection

Configuring Class of Restrictions

SRST and MGCP Gateway Fallback

DSP Resources

Using Tcl Scripts and VoiceXML

Part III: Gatekeepers

Deploying Gatekeepers

Gatekeeper Configuration

Part IV: IP-to-IP Gateways

Cisco Multiservice IP-to-IP Gateway

Appendix A. Answers to Chapter-Ending Review Questions


Cisco Voice Gateways and Gatekeepers
Cisco Voice Gateways and Gatekeepers
ISBN: 158705258X
EAN: 2147483647
Year: 2004
Pages: 218 © 2008-2020.
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