Specifications

Chapter 6 Configuring VoIP
Prerequisite Tasks
6-2
Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Prerequisite Tasks
Before you can configure your Catalyst 4224 to use VoIP, you need to perform
the following tasks:
• Establish a working IP network. For more information about configuring IP,
refer to the “IP Overview,” “Configuring IP Addressing,” and “Configuring
IP Services” sections in the Network Protocols Configuration Guide, Part 1
for Cisco IOS Release 12.0 T.
• Install the voice interface cards (VICs) in your Catalyst 4224. For more
information about installing a VIC in your Catalyst 4224, refer to the
Cisco WAN Interface Cards Hardware Installation Guide.
• Complete your company dial plan.
• Establish a working telephony network based on your company dial plan.
• Integrate your dial plan and telephony network into your existing IP network
topology. Merging your IP and telephony networks depends on your
particular IP and telephony network topology. In general, Cisco recommends
the following:
– Use canonical numbers wherever possible. Avoid situations in which
numbering systems are significantly different on different
Catalyst 4224s or access servers in your network.
– Make routing and dialing transparent to the user; for example, try to
avoid secondary dial tones from secondary switches.
– Contact your private branch exchange (PBX) vendor for instructions on
how to reconfigure the appropriate PBX interfaces.
After you have analyzed your dial plan and decided how to integrate it into your
existing IP network, you are ready to configure your network devices to support
Vo I P.