Microsoft and SIP response codes

Publisher

Microsoft

URL

https://learn.microsoft.com/en-us/troubleshoot/microsoftteams/phone-system/direct-routing/microsoft-sip-response-codes

Published

2024-11-22

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Microsoft Learn terms of use; no-redistribution; short excerpts and locators only

Source notes citing this source

• A Microsoft response code starting with 560 means the final SIP response was generated by the SBC, with the last three digits giving that SIP code (560403 means the SBC sent 403); Microsoft recommends starting with SBC logs and the SBC vendor. in context
• Microsoft's SIP response code guidance applies to Direct Routing PSTN calls and does not apply to Calling Plan or Operator Connect deployments. in context
• Microsoft response codes that do not start with 560 indicate that the final SIP response was generated by a Microsoft service. in context
• A Microsoft response code starting with 560 means the final SIP response was generated by the SBC, and its last three digits are that SIP code (for example 560403 is a 403 from the SBC). Microsoft says to start with the SBC logs and the SBC vendor. Any other Microsoft response code means a Microsoft service generated the final response. in context
• Direct Routing failures carry two codes. The SIP response code (CallEndReason) is three digits and says what happened. The Microsoft response code (CallEndSubReason) is usually six digits, though it can be empty or longer, and says why. Both appear in the Teams admin center and in the Power BI Quality of Experience Report for PSTN. in context

Cite this source record

APA

WarmTransfer. (2024, November 22). Microsoft and SIP response codes. WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-dr-sip-response-codes

BibTeX

@misc{warmtransfer-ms-learn-dr-sip-response-codes,
  title  = {Microsoft and SIP response codes},
  author = {{WarmTransfer}},
  year   = {2024},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-dr-sip-response-codes},
  note   = {Microsoft, accessed 2026-09-24}
}