Source note · SRTP and media encryption negotiation
Microsoft Media Processors always prefer SDES, and SDES is always used between the SBC and the Direct Routing media processor. Without media bypass, a DTLS-only client is converted to SDES by the media processor.
Checked 2026-09-23
Between the SBC and media processor component of Direct Routing, SDES is always used.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC media
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-23
- Checked
- 2026-09-23
Sources
- Direct Routing support for media bypass - Microsoft Teams — Microsoft Learn · tier 2 current vendor documentation · Section 'SDES support requirements'
Cite this note
APA
WarmTransfer. (2026, September 23). SRTP and media encryption negotiation: source note srtp-media-security-teams-dr-sdes-always-sbc-mp. WarmTransfer. https://warmtransfer.net/knowledge/claims/srtp-media-security-teams-dr-sdes-always-sbc-mp
BibTeX
@misc{warmtransfer-claim-srtp-media-security-teams-dr-sdes-always-sbc-mp,
title = {SRTP and media encryption negotiation: source note srtp-media-security-teams-dr-sdes-always-sbc-mp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/srtp-media-security-teams-dr-sdes-always-sbc-mp},
note = {Source note srtp-media-security-teams-dr-sdes-always-sbc-mp, checked 2026-09-23}
}