First, do not ask the same question in different ways in the same forum. That's not going to help anybody.
If I were asking about Polycom equipment on Tek-Tips, I might start with the forum at the below link:
forum461
There may be a better one, but that might get you started in the right direction.
Otherwise, if you are going to pay the money for something like Polycom equipment, then they doggone ought to be able to tell you what their equipment is or is not compatible with. That equipment is not cheap. I can say their video conferencing equipment and phone conferencing equipment works really nicely, but I was never involved with the setup where I had the pleasure of using it.
I'd also try just searching across the web, changing up my search criteria. If the link above doesn't work well enough, surely there's a place online where people talk more regularly about that. I'd definitely consider asking somewhere in the wiring closet type forums here on tek-tips. Seems some of them have a lot of activity and many well informed individuals.
"But thanks be to God, which giveth us the victory through our Lord Jesus Christ." 1 Corinthians 15:57