Vapi helps developers build, test, and deploy voice agents at scale. We enable everything in between the raw models and production, including telephony, test suites, and real-time analytics.
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The "phone-call-provider-closed-websocket" ended reason signifies that the call was terminated because the connection to the phone call provider was closed unexpectedly. This can occur for various reasons, including network issues or disruptions in the connection between Vapi and the telephony provider (1).