When making an outbound call, there is an initial loading time of 20 to 30 seconds before the other end starts ringing.
WebRTC uses a process called "ICE candidate gathering" to establish an audio connection between the caller and the source. The STUN server we use which enables this process is stun:stun.l.google.com:19302. Please contact your internal IT support person and ask them to make sure that there is no firewall rule that will block traffic to and from the Google STUN URL.
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