Source note · Troubleshooting calls that drop on hold or transfer
Microsoft attributes a Direct Routing call that drops without an error code after roughly 10 to 60 minutes to a session timer or session refresh problem tied to the Session-Expires header: the call ends at the stated time unless a reinvite refreshes it first.
Checked 2026-09-30
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- session-timer
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Issues that affect inbound Direct Routing calls — Microsoft · tier 2 current vendor documentation · Calls drop after a specific duration > Calls drop after several minutes
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-dr-drop-after-minutes. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-dr-drop-after-minutes
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-dr-drop-after-minutes,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-dr-drop-after-minutes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-dr-drop-after-minutes},
note = {Source note sip-reinvite-call-drops-dr-drop-after-minutes, checked 2026-09-30}
}