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TANDBERG Border Controller User Manual
Figure 9: Network Deployment with firewalls
Figure 10: Border Controller example configuration
The traversal subzone in Figure 10 may be used to control the amount of traffic flowing through
the Border Controller itself.
Because the Gatekeeper is only managing endpoints on the LAN, its configuration is simpler as
shown in Figure 11.
All of the endpoints in the enterprise will be assigned to the default subzone. The Traversal
subzone controls traversal traffic flowing through the Gatekeeper, whilst the Traversal Zone
controls all traffic traversing the enterprise firewall and passing on to the Borde r Controller. Both
subzones and the Traversal zone are linked: the link between the default subzone and the
Traversal zone is used by endpoints which can send media directly to the Border Controller. The
other two links are used by endpoints using the Gatekeeper to traverse the firewall.
The Border Controller is shipped with Default Zone and Default and Traversal subzones already
configured. They are also preconfigured with the links between these zones to allow calls to
be placed. You may delete or amend the default links if you need to model restrictions of your
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