----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Call Ended Reason]() * [Create Phone Call]() * [List Calls]() * [Phone Calling]() -----------------------------

### Answer The "phone-call-provider-closed-websocket" ended reason signifies that the connection with the call provider was unexpectedly closed. This could occur for a variety of reasons, such as network issues, configuration errors, or timeouts from the provider's side [(1)]() . While the specific likelihood of this happening isn't quantified in the documentation, it can occur under circumstances where the call provider's websocket connection is unstable or improperly configured. Ensuring stable network conditions and proper configuration according to the provider's guidelines might help mitigate such issues. For a detailed breakdown of all possible call termination reasons, you can refer to the detailed documentation on call ended reasons.

Got it. Tagging @User for additional help.