We use both Teams(with RealConnect) and Sfb in our enviornment. I read from http://blog.schertz.name/2019/10/poly-group-series-with-microsoft-teams/
that if running on mixed mode(Teams+Sfb), you need to set the dialing preference to IP H.323 as 1. When I do this and join a Sfb meeting, it just dials the conference ID of the Sfb invite then fails. Once I change it back to SIP->IP H.323, it dials the correct SIP address and joins the meeting successfully. What should be the correct setting?
RealConnect from the Group Series point of view is always a H323 call. When you dial sip, are you actually landing on the RMX?
So you are running your group series as a native Skype client and not H.323? I may be mistaken but RealConnect from the Polycom GS's point of view is an H.323 call to the DMA/RMX.
Ok I think I understand now. We are essentially configured for "Interop" mode. Teams calls utilize IP H.323 to connect with ReallConnect while Sfb calls still call to SIP natively.
That is exactly what RealConnect is. Interop with each client type landing on their native conference servers and then the conference servers talk to each other, not the endpoints.