Chapter 4 Configuring Voice Over Ip; Prerequisites - Cisco 2431 - IAD Router Software Configuration Manual

Configuring Voice over IP
This chapter explains how to configure voice interfaces and ports, which convert telephone voice signals
for transmission over an IP network.
This chapter presents the following major topics:
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VoIP enables your Cisco IAD to carry live voice traffic (for example, telephone calls and faxes) over an
IP network. VoIP offers the following benefits:
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For more information on understanding and configuring VoIP, see the
document.

Prerequisites

Before you can configure your Cisco integrated access device (IAD) to use VoIP, you must first do the
following:
•
Note
OL-4306-03
Prerequisites, page 4-1
Configuring the Voice Interface, page 4-2
VoIP Configuration Examples, page 4-4
Toll bypass
Remote PBX presence over WANs
Unified voice and data trunking
Plain old telephone service (POTS)–Internet telephony gateways
Establish a working IP network.
For information applicable to the Cisco IAD2400 series, see "Voice over IP for the
Cisco 3600 Series Overview," and references therein, at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113t/113t_1/voip/
voipover.htm
See also Configuring Voice over IP for the Cisco 3600 Series at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/voice_c/vcprt1/
vcvoip.htm
Cisco IAD2430 Series Integrated Access Devices Software Configuration Guide
4
C H A P T E R
Configuring Voice over IP
4-1