Describe a Netmeeting application (based on H.323)
Case 1: The client connects to a Netmeeting server via ADSL router. The Netmeeting server is on the Internet.
Solution: It will establish the call without any setting in the ADSL router.

Case 2: The Netmeeting server is located behind the ADSL router. The client is on the Internet.
Solution: We must make some settings in the ADSL router before establishing Netmeeting connection.
Step 1: Add a security trigger with console command
Ex: admin> security add trigger t1 Netmeeting (where t1 is a arbitrary trigger name)
Step 2: In the virtual server, adding a mapping port (H323 or 1720) to the IP of Netmeeting server., the Netmeeting will be established completely after finishing the setting.

After firmware version, V4.25, the console command will be added automatically when user enable/set the mapping port (H323 or 1720) to a local IP address.