ORTC is just an API. The WebRTC protocol itself is defined in RTCWEB at the IETF and based on the existing RTP and RTCP transports, and SCTP transport layer. I

ORTC is just an API. The WebRTC protocol itself is defined in RTCWEB at the IETF and based on the existing RTP and RTCP transports, and SCTP transport layer. I don't think you'll be able to do better.