Moz/Cisco API: signaling

Hi!

I can't find info about the signaling for PeerConnection in the doc.

I found "sendSignal is a function that is provided by the caller which will be called when the user-agent needs to transport and out of band signalling message to the remote peer. When a message is received from the remote peer via this channel, it must be sent to the user-agent by calling receivedSignal()."

However, it is not clear what is signaling out-of-band this way and what (anything?) would go in band. Perhaps you could clarify in the doc (I think that Cullens high-, mid- and low-path slides circulated on the rtcweb list and the discussion that followed indicates that these parts must be quite clearly stated).

Cheers,
Stefan