The certified SBC page repeats that media re-targeting isn't supported: if the SBC sends a new media IP during a Direct Routing call it is negotiated in signalling but Teams never sends media to the new address.

Checked 2026-09-16

During a Direct Routing call, if the SBC sends a new media IP to Teams Direct Routing, although it is negotiated in the SIP signaling, the media is never sent to the new IP address from Teams Direct Routing.
Vendor
Microsoft
Product
certified SBC list
Subsystem
media path
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-16
Checked
2026-09-16

Sources

Cite this note

APA

WarmTransfer. (2026, September 16). CUCM to Teams Phone migration: source note cucm-to-teams-phone-sbc-media-retargeting. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-sbc-media-retargeting

BibTeX

@misc{warmtransfer-claim-cucm-to-teams-phone-sbc-media-retargeting,
  title  = {CUCM to Teams Phone migration: source note cucm-to-teams-phone-sbc-media-retargeting},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cucm-to-teams-phone-sbc-media-retargeting},
  note   = {Source note cucm-to-teams-phone-sbc-media-retargeting, checked 2026-09-16}
}

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