Source note · DTMF methods and interoperability failures
The Direct Routing 'RFC standards' list that SBCs must comply with does not name RFC 2833 or RFC 4733, so the page does not itself specify which out-of-band DTMF method or payload type Teams expects.
inferred · Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC compliance
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Status
- inferred
- Checked
- 2026-09-24
Sources
- Teams Phone Direct Routing: Definitions and RFC standards — Microsoft · tier 2 current vendor documentation · Section 'RFC standards' and subsections (absence)
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-teams-dr-rfc-list-omits-4733. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-teams-dr-rfc-list-omits-4733
BibTeX
@misc{warmtransfer-claim-dtmf-interop-teams-dr-rfc-list-omits-4733,
title = {DTMF methods and interoperability failures: source note dtmf-interop-teams-dr-rfc-list-omits-4733},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-teams-dr-rfc-list-omits-4733},
note = {Source note dtmf-interop-teams-dr-rfc-list-omits-4733, checked 2026-09-24}
}