WebRTC indirect media

Hello,

I'm planning on using Rainbow solutions at my company for users to be able to make external calls directly on teams without having to use a physical desktop phone.

The only issue I have is that my IPBX is on a "Communication" LAN while the computers with teams are on a "Computers" LAN. The two networks are physically dissociated for security purposes meaning the Rainbow Desktop app will never be able to communicate with the WebRTC direct media.

However, as all teams users have access to internet, I'm planning on only setting up connections using the WebRTC "indirect" media as seen on this image :

Would it be possible to only have "indirect" users that are not directly connected to the WebRTC but still benefits from all the features provided by it ? How different would it be to set it up this way ?

Thank you in advance for your answers,

M.P.