The call reaches the initial greeting and accepts an IVR option, so the Local Gateway and inbound call delivery are working at least through the first media and signaling stage. The failure occurs after the caller makes a menu selection, which points at the flow branch or the next activity after that menu, not at the trunk itself. Cisco's Flow Designer documentation explains that flows define what happens at each stage of a call, including prompts, menu handling, queueing, transfers, and disconnect behavior. If a branch after the selected option has an invalid Queue Contact configuration, an invalid transfer destination, an unhandled error, or an incorrect terminal node, the customer may hear the greeting and then be disconnected. Analyzer can confirm call records after the fact, but the fastest root-cause path is to inspect the flow configuration and the branch selected by the caller. Queue or channel association issues would usually prevent reaching the intended IVR stage. Reference: Cisco Help, Build and manage flows with Flow Designer; Understand Routing and Queueing in Webex Contact Center.