[HTML5] Attempt to fix SIP.js listen only permission problems #5931
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This was referenced Oct 28, 2023
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Rationale: the negotiation failed because SIP.js was resolving the local description without properly waiting for ICE completion, so the generated SDP would end up without any ICE candidate and FreeSWITCH would reject the call. The permissioning thing was more of a side effect that freed the stuck ICE candidate, so it ended up working. We now only resolve the local description when ICE gathering was properly completed and processed.