### Answer Based on the available sources, your issue where the agent doesn't hear anything after the initial greeting and then repeats an "are you there" reminder before hanging up could be related to several configuration settings. The reminder_trigger_ms setting controls when the agent speaks if the user has been silent for a specified duration after agent speech [(1) ]() [(2) ]() . By default, this is set to 10000 ms (10 seconds) . The reminder_max_count setting controls how many times the agent will remind the user when unresponsive, with a default value of 1 (remind once) . Additionally, the end_call_after_silence_ms setting determines when to end the call if users stay silent for a period after agent speech, with a default of 600000 ms (10 minutes) . Your issue sounds like an audio input problem where the agent isn't receiving the user's audio. According to the troubleshooting documentation, background noise and poor acoustics can interfere with the voice assistant's ability to understand commands [(3) ]() . The sources recommend implementing noise reduction algorithms to filter out background noise and enhance speech clarity , using acoustic modeling techniques to improve recognition in noisy environments , and optimizing microphone quality and placement . The denoising_mode setting determines what denoising mode to use, with options including "no-denoise", "noise-cancellation", and "noise-and-background-speech-cancellation", with "noise-cancellation" as the default [(2) ]() . I recommend checking: - Your microphone configuration and permissions - The denoising_mode setting for your agent -

Whether there are any audio input issues on the calling device - The agent's webhook logs to see if audio is being received

​ To learn more, see the sources I considered: [[1] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[2] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) [[3] Troubleshooting AI Voice Agent Issues | Retell AI](https://www.retellai.com/blog/troubleshooting-common-issues-in-voice-agent-development) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.