https://tools.ietf.org/html/draft-ietf-rtcweb-audio now requires support for tones 0 through 9, A through D, * and #. This should be referenced in the ORTC API.
Related WebRTC 1.0 Issue; w3c/webrtc-pc#391
Required DTMF Tone Support
Fix for Issue #384
Added change log entry for Issue 384
Added change log entry for Issue #384