Source note · DTMF methods and interoperability failures
For media bypass early media, Microsoft says the SBC should support sending DTMF during the early-media phase to enable IVR and voicemail scenarios.
Checked 2026-09-24
The SBC should have support for sending DTMF during this phase to enable IVR/voicemail scenarios.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing (media bypass)
- Subsystem
- early media
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Direct Routing support for media bypass - Microsoft Teams — Microsoft Learn · tier 2 current vendor documentation · Scenarios > Inbound call from SBC > Early media
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-teams-dr-early-media-dtmf. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-teams-dr-early-media-dtmf
BibTeX
@misc{warmtransfer-claim-dtmf-interop-teams-dr-early-media-dtmf,
title = {DTMF methods and interoperability failures: source note dtmf-interop-teams-dr-early-media-dtmf},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-teams-dr-early-media-dtmf},
note = {Source note dtmf-interop-teams-dr-early-media-dtmf, checked 2026-09-24}
}