Voip Trunk Gateways; Pre-Installation System Requirements - Nortel BCM50 Configuration Manual

Chapter 43

VoIP trunk gateways

You can use a VoIP trunk to establish communications between a BCM and a remote system
across an IP network. Each trunk is associated with a line record (lines 001-012), and are
configured in the same way that other lines are configured.
However, VoIP trunks have additional programming to support the IP network connection.
This system supports SIP trunks and H.323 trunks. Both types of trunks support connections to
other BCMs, a central call server such as Succession 1000/M, and trunk-based applications. SIP
trunks and H.323 trunks are assigned to a single Pool, and the routing decision to route calls via
H.323 or SIP is made based on the routing modes of the two services (Direct/Gatekeeper/Proxy)
and the combined routing table.
To access the Voice over IP (VoIP) trunk gateway in Element Manager, select:
• Element Manager: Configuration > Resources > Telephony Resources > IP Trunks >
Routing Table tab
Configuring a VoIP trunk requires the following:
• "Pre-installation system requirements" on page 367
• "Keycodes" on page 368
• "H.323 network applications considerations" on page 368
• "SIP network applications considerations" on page 368
You can use VoIP trunks for calls originating from any type of telephone within the BCM system.
Calls coming into the system over VoIP trunks from other systems can be directed to any type of
telephone within the system.
You cannot program Auto DN or DISA DN for VoIP trunks; therefore, you cannot use CoS
passwords to remotely access features on your system. The exception to this would be a
tandemned call, where a call comes into system A over the PSTN, then tandems to system B over
a VoIP trunk. In this case, the remote access package on the line will determine which system
features are available to the caller.

Pre-installation system requirements

Ensure that you have obtained the following information or familiarize yourself with the
requirements before continuing with VoIP trunk configuration:
Networking Configuration Guide
367