Guest: We are at a “proposed final” true release candidate with nothing known remaining to be changed or fixed. For the full story, please see this page in the "Pre-Release Announcements & Feedback" forum. /Steve.
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I do not know of an H.323 test. Would be great to have. No matter, if your router supports it, you should be able to disable it. There are screen shots of what this might look like for a handful of routers here