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Chapter 5 Configuring local VoIP trunks 83

IP Telephony Configuration Guide

H.323 network applications considerations

In order to maintain a level of quality of transmission over VoIP trunks, QoS monitor must be

enabled and configured. Refer to “Configuring a remote gateway (H.323 trunks)” on page 96 and

“Quality of Service Monitor” on page 120.

If your network uses a gatekeeper (H.323 trunks only), there are also specific settings that must be

set on the Local Gateway screen to recognize the gatekeeper, and also within the gatekeeper

application, so that VoIP lines are recognized. Refer to “Using a gatekeeper” on page 127.

If you plan to use H.323 trunking and you have a firewall set up, ensure that the ports you intend to

use have been allowed. Refer to “Incoming calls: Assigning target lines” on page 92.

Chapter 8, “Typical network applications using MCDN,” on page 139 provides examples of VoIP

trunks used in private networking.

Determining your IP trunk count

After you enter the keycode(s) for your VoIP trunks, you need to specify how many of the trunks

will be used for H.323 trunking and how many for SIP trunking. Once these parameters are set,

you can go to Line programming (Services, Telephony Services) to determine the parameters for

each line, including assigning line pools for each type of trunk so that you can configure the

routing. You must also assign the H.323 or SIP line pools to each telephone that you want to be

able to call out over the lines.

Since H.323 trunks and SIP trunks use the same pool of available lines (001 to 060), you can use

the IP Trunks Settings screen to keep track of the total number of enabled trunks and how they are

distributed between H.323 and SIP trunks.

1 Enter the keycodes that you need to enable enough IP lines for your requirements.

2 In Unified Manager, click the keys beside Services, IP Telephony.

3 Click IP Trunks.

The IP Trunks Settings screen appears.

Warning: Ensure that all systems in your network are either running BCM 3.5 or later

software or have the QoS patch installed that allows them to interoperate with BCM 3.5 or

later software. Systems running BCM software previous to 3.5 that do not have this patch

installed cannot support VoIP trunks with systems running BCM 3.5 or later software. If

you need more information, contact Nortel technical support (ITAS).

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Avaya IP Telephony Guía de configuración Pagina 83