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IP Telephony Configuration Guide
Chapter 4
VoIP Trunk Configuration
This chapter explains how to configure VoIP trunks on a Business Communications Manager. A
VoIP trunk allows you to establish communications between a Business Communications Manager
and a remote system across an IP network.
Configuring a VoIP trunk requires the following actions:
• Installing keycodes
• Configuring media parameters
• Outgoing call configuration
• Incoming call configuration
Installing keycodes
Before you can use VoIP, you must obtain and install the necessary keycodes. See the Keycode
Installation Guide for more information.
Setting the Published IP Address
The published IP address is the IP address used by computers on the public network to find the
Business Communications Manager. For example, if a Business Communications Manager has a
LAN interface (LAN1) that is connected only to local office IP terminals and a WAN interface
(WAN1) that is connected to the public network, then WAN1 should be set to the published IP
address.
To set the published IP address:
Note: VoIP trunks can be used for calls originating from any type of phone on the
Business Communications Manager system. They are not strictly for use with IP
terminals.
Note: If you are using the Business Communications Manager with an M1, you
must set up the system to be compatible with the M1. See Appendix D,
“Interoperability,” on page 111.
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