DSP Resources

Table of contents:

This chapter covers the use of digital signal processors (DSP) in Cisco voice gateways. Voice gateways use DSPs to terminate voice calls from time-division multiplexing (TDM) systems and convert those calls to Voice over IP (VoIP). DSPs can also provide transcoding and conference bridge resources to a Cisco CallManager.

This chapter helps you to do the following:

  • Understand the capabilities of DSPs
  • Determine the number of DSPs required to support your requirements
  • Configure a gateway to provide conferencing resources for CallManager
  • Configure a gateway to provide transcoding resources for CallManager and Cisco CallManager Express (CME)
  • Understand the methods available for supporting fax and modem traffic
  • Configure the gateway to support fax and modem traffic

Need for DSP Resources

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

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