Configured TURN Server requriement.

Hi,

I am looking at the enterprise firewall issues relating to section 4.2.5 of draft-ietf-rtcweb-use-cases-and-requirements. These require that the browser be configured with network specific STUN and TURN server addresses as well as those provided by the web application.

If the browser is configured in such a way does the API allow the application to determine this and if so how?

If for example the network specific TURN server is not available at what point does the application receive an error indication and what is the indication?

Regards
Andy