Source note · Early media and ringback behavior

When a Teams user has several endpoints, the Direct Routing SIP proxy can send several 180 Ringing responses, one per endpoint Call progress, each a separate early dialog with a different To tag.

Checked 2026-09-24

Vendor: Microsoft
Product: Teams Phone Direct Routing
Subsystem: forking
Deployment: multi-tenant
Region: not restricted
Release range: current as of 2026-09-24
Checked: 2026-09-24

Sources

Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Multiple endpoints ringing with provisional answer, step 3

Cite this note

APA

WarmTransfer. (2026, September 24). Early media and ringback behavior: source note early-media-ringback-teams-fork-per-endpoint. WarmTransfer. https://warmtransfer.net/knowledge/claims/early-media-ringback-teams-fork-per-endpoint

BibTeX

@misc{warmtransfer-claim-early-media-ringback-teams-fork-per-endpoint,
  title  = {Early media and ringback behavior: source note early-media-ringback-teams-fork-per-endpoint},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/early-media-ringback-teams-fork-per-endpoint},
  note   = {Source note early-media-ringback-teams-fork-per-endpoint, checked 2026-09-24}
}

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