Source note · SIP 488 and codec negotiation failures
In a bypassed Direct Routing call the Media Processor is never in the path, so the client and SBC must share a codec directly because no Microsoft component transcodes.
inferred · Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- media bypass
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Status
- inferred
- 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 (comparison table)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-bypass-no-transcode. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-bypass-no-transcode
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-teams-bypass-no-transcode,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-teams-bypass-no-transcode},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-teams-bypass-no-transcode},
note = {Source note sip-488-codec-failures-teams-bypass-no-transcode, checked 2026-09-25}
}