Source note · SIP 488 and codec negotiation failures
Microsoft's Direct Routing infrastructure table lists media transport as TCP/RTP/SAVP and UDP/RTP/SAVP, meaning the SBC-to-Teams media leg is SRTP.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- media transport
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Section Infrastructure requirements, row Media transport
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-dr-media-savp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-dr-media-savp
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-teams-dr-media-savp,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-dr-media-savp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-dr-media-savp},
note = {Source note sip-488-codec-failures-teams-dr-media-savp, checked 2026-09-25}
}