Source note · SIP trace capture and ladder analysis
For Direct Routing failures Microsoft reports a SIP response code (CallEndReason) and a Microsoft response code (CallEndSubReason) that is usually six digits but can be shorter or longer.
Checked 2026-09-23
- Vendor
- Microsoft
- Product
- Microsoft Teams Phone Direct Routing
- Subsystem
- response codes
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-23
- Checked
- 2026-09-23
Sources
- Microsoft and SIP response codes — Microsoft · tier 2 current vendor documentation · Introduction, bulleted definitions
Cite this note
APA
WarmTransfer. (2026, September 23). SIP trace capture and ladder analysis: source note sip-trace-analysis-teams-code-fields. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trace-analysis-teams-code-fields
BibTeX
@misc{warmtransfer-claim-sip-trace-analysis-teams-code-fields,
title = {SIP trace capture and ladder analysis: source note sip-trace-analysis-teams-code-fields},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trace-analysis-teams-code-fields},
note = {Source note sip-trace-analysis-teams-code-fields, checked 2026-09-23}
}