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An External Network Elements object should already be created. Right Click on External Network Elements object and select New External Gateways. The pane that appears is a placeholder to allow configuring multiple gateways beneath it. No information needs to be entered here.
Right Click on the External Gateways object and select New External Gateway. A pane like below will appear.
Enter information into the following fields.
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The information entered is all that is needed for this example. For more information on the other fields in the External Gateway Pane click on External Gateway link.
Configuring the Phones as gateways has been accomplished. The next step is to configure the IMG 1010 - Configure IP Bearer Profiles and Vocoder Entries.