
74 Chapter 5 Configuring VoIP trunks
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Pre-installation system requirements
Ensure that you have obtained the following before continuing:
Keycodes
Before you can use VoIP, you must obtain and install the necessary keycodes. See the Keycode
Installation Guide for more information about installing the keycodes. Talk to your Business
Communications Manager sales agent if you need to purchase VoIP keycodes.
Each keycode adds a specific number of VoIP trunks. You must reboot your Business
Communications Manager after you enter VoIP keycodes to activate trunking.
If you want to use the MCDN features on the VoIP trunks, you will need an MCDN keycode.
However, if you have already deployed MCDN for your SL-1 PRI lines, you do not require an
additional keycode.
Published IP address
You will require the public IP address to set up the gateways for VoIP trunks. Refer to “Defining
published IP address” on page 35 for details.
Configuring media parameters
You can use the screen described in this section to determine the order the system will select
codecs for your IP terminals, the silence suppression settings, and the jitter buffers.
1 In Unified Manager, click on the keys beside Services, IP Telephony.
2 Click on H.323 trunks.
3 Click on the Media Parameters tab.
The Media Parameters dialog appears.
Figure 17 Media parameters
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