Every P2P session opens in a starting room before anything is negotiated. Both of you are on it, with what each is still doing beside the name, and below that the camera preview and the microphone, camera and speaker the session will use.
Ready is two things at once
Pressing Ready saves the devices you picked and tells the other side you are listening. Both halves matter: a connection offered to a browser that has not finished setting up is a connection that never completes, which is why the room waits for both of you instead of starting the moment the invite is accepted.
Start belongs to whoever invited
The person who sent the invite is the host, and only they have Start. It stays disabled until both sides are ready, and the line under the roster says who is being waited for. If the host cancels before starting, the session ends and any link to it stops working.
Route and privacy
Open Route and privacy to force the connection through the relay, which hides your IP address from the other side at the cost of some latency. It is only available when this server has a relay configured, and the starting room is where it is decided: once the session begins, the route is fixed for it. The choice is remembered for the next one.
See also: P2P Sessions in Chat · P2P Session in Its Own Tab
