Source note · SIP 488 and codec negotiation failures
The Teams Media Processor is a B2BUA that can transcode (for example SILK toward the client and G.711 toward the SBC), whereas Transport Relays never change the codec between client and SBC.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- transcoding
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Plan for media bypass with Direct Routing — Microsoft · tier 2 current vendor documentation · Section Use of Media Processors and Transport Relays (transcoding explanation note)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-mp-transcodes. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-mp-transcodes
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-teams-mp-transcodes,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-mp-transcodes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-mp-transcodes},
note = {Source note sip-488-codec-failures-teams-mp-transcodes, checked 2026-09-25}
}