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Knowledge Base & Operational DocumentationWhy Does a Business Phone Keep Dropping Calls After a Few Minutes?
11/10/2026
Calls that end after a consistent interval may point to session timers, NAT mappings, firewall state, provider limits, or handset behavior.
Checks to make
Compare call duration and direction, capture provider call references, review session timer and NAT settings, and test a known-good network path. Avoid changing multiple SIP settings together; coordinate with the carrier before altering production routing.
When to get help
VoIP support can trace call signaling and session behavior with the provider. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.