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Knowledge Base & Operational DocumentationWhy Does a VoIP Call Drop When a User Transfers It to a Mobile Phone?
A call transfer to a mobile number may fail because of dial-plan rules, carrier restrictions, transfer mode, caller ID, or an external call limit. The original call can be released before the mobile leg is established.
What to check
Check call records, transfer type, number format, extension permissions, trunk limits, and provider error codes. Test attended and blind transfer paths separately with an approved destination.
Recommended next step
Use a supported transfer method and correct permission or routing settings. Confirm who remains connected during failure and communicate any restrictions on external transfers.
How Informatix Systems can help
Informatix Systems provides VoIP and business communications services. We can review the setup, trace the issue through relevant systems, and help plan a practical correction. Contact us with the platform involved, when the issue began, and non-sensitive error details.