Source note · Hold resume and conference signaling
The Microsoft Direct Routing SIP protocol article says Direct Routing rejects SIP requests that carry Replaces headers and tells admins to make sure the SBC is not using them.
disputed · Checked 2026-09-24
Direct Routing rejects SIP requests that have Replaces headers defined.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- Replaces
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Status
- disputed
- Checked
- 2026-09-24
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Section Processing the incoming request: finding the tenant and user, Note under the OPTIONS example table
Cite this note
APA
WarmTransfer. (2026, September 24). Hold resume and conference signaling: source note hold-resume-conference-msdr-replaces-rejected. WarmTransfer. https://warmtransfer.net/knowledge/claims/hold-resume-conference-msdr-replaces-rejected
BibTeX
@misc{warmtransfer-claim-hold-resume-conference-msdr-replaces-rejected,
title = {Hold resume and conference signaling: source note hold-resume-conference-msdr-replaces-rejected},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/hold-resume-conference-msdr-replaces-rejected},
note = {Source note hold-resume-conference-msdr-replaces-rejected, checked 2026-09-24}
}