Our videoconferencing system at home was *VERY* particular about what brand of router it would play nicely with. Turns out the Linksys that had been completely suitable for every single purpose for which I intended it was not workable for our VC setup. It had to be D-Link. I would not have believed it if I had not seen it with my own two eyes.
Additionally, I found it enormously helpful to have a separate public IP address for the video camera, which made it easier for inbound callers to find it. Essentially we have two networks here at home--the videoconference one and everything else.
What is the manufacturer of your VC gear? The NAT isn't a deal breaker. We've got that working here too. I think I need more info. Who are you trying to receive a call from?
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