Source note · CUCM to Teams Phone migration
Media Processors are a B2BUA and can transcode (for example SILK from the Teams client to G.711 toward the SBC), while Transport Relays are not a B2BUA and never change the codec between the client and the SBC even when traffic flows via relays.
Checked 2026-09-16
Transport Relays aren't B2BUA, which means the codec is never changed between the client and the SBC--even if traffic flows via relays.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- media path
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-16
- Checked
- 2026-09-16
Sources
- Plan for media bypass with Direct Routing — Microsoft · tier 2 current vendor documentation · Use of Media Processors and Transport Relays > comparison table and transcoding explanation
Cite this note
APA
WarmTransfer. (2026, September 16). CUCM to Teams Phone migration: source note cucm-to-teams-phone-media-transcoding-split. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-media-transcoding-split
BibTeX
@misc{warmtransfer-claim-cucm-to-teams-phone-media-transcoding-split,
title = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-media-transcoding-split},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-media-transcoding-split},
note = {Source note cucm-to-teams-phone-media-transcoding-split, checked 2026-09-16}
}