Source note · One SBC serving several calling platforms
Microsoft tells administrators to make sure the SBC does not use Replaces headers in SIP requests, because Direct Routing rejects SIP requests that define Replaces headers.
Checked 2026-10-14
Direct Routing rejects SIP requests that have Replaces headers defined.
- Vendor
- Microsoft
- Product
- Teams Phone
- Subsystem
- Direct Routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-14
- Checked
- 2026-10-14
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Processing the incoming request: finding the tenant and user (note, third bullet)
Cite this note
APA
WarmTransfer. (2026, October 14). One SBC serving several calling platforms: source note multi-platform-sbc-design-teams-rejects-replaces. WarmTransfer. https://warmtransfer.net/knowledge/claims/multi-platform-sbc-design-teams-rejects-replaces
BibTeX
@misc{warmtransfer-claim-multi-platform-sbc-design-teams-rejects-replaces,
title = {One SBC serving several calling platforms: source note multi-platform-sbc-design-teams-rejects-replaces},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/multi-platform-sbc-design-teams-rejects-replaces},
note = {Source note multi-platform-sbc-design-teams-rejects-replaces, checked 2026-10-14}
}