Hi all. I have a tandberg video conferencing unit that Im trying to get to work with calls outside the network. I can successfully place calls out to the Internet, but I can not place calls from the Internet to the inside where the Tandberg sits. I have opened up every port possible to allow for incoming calls to this unit to take place, with no positive result. Has anyone done this sort of thing before and if so, what did you do to get this to work out? Many thanks.