Random call drops at 15 minutes on Teams Direct Routing
by voip.kb lablast verified 2026-06-18tested 2026-04-02
Problem
Calls disconnect at almost exactly 15 minutes when routed through an on-prem SBC.
Symptoms
- Drops near 900 seconds
- Only external calls affected
- No user-visible error
Full resolution locked
Root cause, reproduction steps, and evidence are members-only.
This article contains 0 verified steps, 0 code blocks, and 0 additional screenshots.