Cisco C60 Enter the IP address of the device in your browser. Enter your username and password. Navigate to Configuration > System Configuration > H323. Configure the following and click Save after each option: Enter the NAT Address. Select Off for the Mode. Select Direct for the CallSetup Mode. Select Dynamic for the PortAllocation. Enter the LoginName. This is the extension of the device. Select Off for the Mode. Enter the Password. Enter the Gatekeeper Address. Select Manual for Discovery. Enter the E164 information. Enter the ID information.