Microsoft and SIP response codes

Publisher

Microsoft

URL

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

Published

2024-11-22

Updated

unknown

Accessed

2026-09-23

HTTP status

200

License

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

Source notes citing this source

• If a Direct Routing Microsoft response code starts with 560, the final SIP response was generated by the SBC and the last three digits are that SIP code (for example 560403 means the SBC sent 403); any other prefix means a Microsoft service generated it. in context
• 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. in context
• Microsoft's Direct Routing diagnosis and response-code guidance applies to Direct Routing PSTN calls and does not apply to Calling Plan or Operator Connect deployments. in context

Cite this source record

APA

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

BibTeX

@misc{warmtransfer-ms-learn-microsoft-sip-response-codes,
  title  = {Microsoft and SIP response codes},
  author = {{WarmTransfer}},
  year   = {2024},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-microsoft-sip-response-codes},
  note   = {Microsoft, accessed 2026-09-23}
}