Issues that affect inbound Direct Routing calls

Publisher

Microsoft

URL

https://learn.microsoft.com/en-us/troubleshoot/microsoftteams/phone-system/direct-routing/issues-with-inbound-calls

Published

2026-06-30

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Microsoft Learn terms of use (CC BY 4.0 for docs content in some repos; treat as restricted); no-redistribution; short excerpts and locators only

Source notes citing this source

• Microsoft says a Direct Routing call that drops without an error code after 10 to 60 minutes connected may indicate a session timer or refresh problem. in context
• Microsoft's resolution is to configure the SBC so the correct party refreshes before expiry, and to trace any carrier-originated BYE back to its source. in context
• Microsoft's Direct Routing guidance says refresher=uac makes the INVITE sender responsible for refreshes and refresher=uas makes the INVITE receiver responsible. in context

Cite this source record

APA

WarmTransfer. (2026, June 30). Issues that affect inbound Direct Routing calls. WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-dr-inbound-call-issues

BibTeX

@misc{warmtransfer-ms-learn-dr-inbound-call-issues,
  title  = {Issues that affect inbound Direct Routing calls},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-dr-inbound-call-issues},
  note   = {Microsoft, accessed 2026-09-25}
}