How Voip Trunks Make A Network - Nortel BCM50 Configuration Manual

368 Chapter 43 VoIP trunk gateways
Keycodes
Before you can use VoIP, you must obtain and install the necessary keycodes. See the Keycode
Installation Guide (NN40010-301) for more information about installing the keycodes. Talk to
your BCM sales agent if you need to purchase VoIP keycodes.
Each keycode adds a specific number of VoIP trunks. To activate trunking, you must reboot your
BCM after you enter VoIP keycodes.
If you want to use the MCDN features on the VoIP trunks, you will need an MCDN keycode. If
you have already deployed MCDN for your SL-1 PRI lines, you do not require an additional
keycode.
H.323 network applications considerations
In order to maintain a level of quality during call setup, QoS monitor must be enabled and
configured.
If your network uses a gatekeeper (H.323 trunks only), there are also specific settings that must be
set on the H323 Settings panel to recognize the gatekeeper, and also within the gatekeeper
application, so that VoIP lines are recognized. Also refer to gatekeeper configuration
interoperability: Gatekeeper configuration" on page 389
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.
SIP network applications considerations
In order to maintain a level of quality during call setup, QoS monitor must be enabled and
configured.
SIP URI maps of both endpoints must match.
If you plan to use SIP trunking and you have a firewall set up, ensure that the ports you intend to
use have been allowed.

How VoIP trunks make a network

Figure 112 shows a simple private networking configuration of three systems connected by VoIP
trunks. As in all private networking, each system has direct routing configurations to the directly
adjacent systems. As well, the dialing plans are configured to ensure that remote calls are correctly
routed to the receiving system, such as, if Node A called someone in Node C.
NN40020-603 NN40020-603
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"VoIP