Connecting to an IP WAN

The previous chapters have focused on Voice over IP (VoIP) within the IP network at a single site. The gateway in such a setup would interconnect public switched telephone network (PSTN), PBX, and other plain old telephone service (POTS) endpoints with voice-enabled IP endpoints, such as IP phones. VoIP over the WAN has several applications, such as connecting multiple sites, allowing service providers to terminate long-distance and local voice calls, providing voice services to telecommuters, and so on.

In this chapter you will learn

  • Applications for connecting to an IP WAN
  • Design considerations when using VoIP over an IP WAN
  • Quality of Service issues and solutions
  • Configuring Quality of Service to fit a provider's MPLS standards
  • Providing fax and modem services within a VoIP network
  • Ways to secure your VoIP traffic

Part I: Voice Gateways and Gatekeepers

Gateways and Gatekeepers

Part II: Gateways

Media Gateway Control Protocol

H.323

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

Index

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Cisco Voice Gateways and Gatekeepers
Cisco Voice Gateways and Gatekeepers
ISBN: 158705258X
EAN: 2147483647
Year: 2004
Pages: 218
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