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Knowledge Base & Operational DocumentationWhy Does a Business Phone Ring on One Device but Not Another?
11/10/2026
A call may reach one registered device while another stays silent because of device registration, call group rules, forwarding, Do Not Disturb, or network reachability.
What to check
Check the affected extension, registration status, ring group membership, forwarding settings, device time, and whether the issue occurs for internal and external calls. Record a test call time.
Recommended next step
Verify the intended call flow and update the narrowest incorrect setting. Informatix Systems can troubleshoot business VoIP extensions and call routing.