I have TANDBERG video conference unit. The unit is setup in my coporate LAN, inside firewall. I want to configure it to be stand alone unit (i.e. not registering to any server at all) and able to handle call from external public party (incoming call and outgoing call). I am not sure how to configure the NAT on JUNIPER NS-25. It is running on firmware version NetScreen ScreenOS 5.3.0. Any idea?