In Teams Direct Routing, code 560408 means the SBC itself returned 408 (user did not respond); Microsoft advises reviewing call records with CallEndSubReason 560408 for trends by called number or destination country to find a downstream problem.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Teams Direct Routing
- Subsystem
- call signalling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- SIP 408 and Microsoft response codes - Microsoft Teams — Microsoft · tier 2 current vendor documentation · Section '560408 408 SBC indicated that the user did not respond (request timeout)'
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting SIP 408 Request Timeout and calls that get no response: source note sip-408-timeout-troubleshooting-ms-560408-downstream. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-ms-560408-downstream
BibTeX
@misc{warmtransfer-claim-sip-408-timeout-troubleshooting-ms-560408-downstream,
title = {Troubleshooting SIP 408 Request Timeout and calls that get no response: source note sip-408-timeout-troubleshooting-ms-560408-downstream},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-ms-560408-downstream},
note = {Source note sip-408-timeout-troubleshooting-ms-560408-downstream, checked 2026-10-02}
}