The W3C RTCDTMFSender insertDTMF method accepts tone durations of 40 to 6000 ms and an inter-tone gap of at least 30 ms.

Checked 2026-09-24

Vendor
W3C
Product
WebRTC 1.0 API
Subsystem
dtmf
Deployment
browser
Region
not restricted
Release range
W3C Recommendation 2025-03-13
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). WebRTC in modern contact centers: source note webrtc-deployment-w3c-insertdtmf-range. WarmTransfer. https://warmtransfer.net/knowledge/claims/webrtc-deployment-w3c-insertdtmf-range

BibTeX

@misc{warmtransfer-claim-webrtc-deployment-w3c-insertdtmf-range,
  title  = {WebRTC in modern contact centers: source note webrtc-deployment-w3c-insertdtmf-range},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/webrtc-deployment-w3c-insertdtmf-range},
  note   = {Source note webrtc-deployment-w3c-insertdtmf-range, checked 2026-09-24}
}

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