Vapi is the Voice AI platform for developers.

Vapi AI

Hello everyone, I am working on an outbound calling system, and I want it to hang up immediately if the call is picked up by voicemail.

How can I achieve this?

<@1127604174343897180>
Hello! To ensure that your outbound calling system hangs up immediately when a voicemail is detected, you can utilize the `voicemailDetection` feature. Here's how you can set it up:

1. Enable `voicemailDetection` by setting `voicemailDetection.enabled` to `true`.
2. Configure `voicemailDetection.machineDetectionTimeout` to specify the maximum amount of time in seconds that the system should wait for voicemail detection.
3. Adjust `voicemailDetection.machineDetectionSpeechThreshold`, `voicemailDetection.machineDetectionSpeechEndThreshold`, and `voicemailDetection.machineDetectionSilenceTimeout` to fine-tune the detection based on the characteristics of the voicemail greetings you expect to encounter.

Once voicemail is detected, the system will execute the action you've defined, such as hanging up the call. If you need assistance with setting these parameters or implementing the feature, please let me know!

You can continue this conversation by mentioning me in the message.

you have to add the following to your assistant using api.

      voicemailDetection: {
        provider: "twilio",
        voicemailDetectionTypes: [
          "machine_end_beep",
          "machine_end_silence",
        ],
        enabled: true,
        machineDetectionTimeout: 25,
        machineDetectionSpeechThreshold: 3500,
        machineDetectionSpeechEndThreshold: 2750,
        machineDetectionSilenceTimeout: 6000,
      },
      voicemailMessage: voicemailPrompt,

also check the api for more machine detection options and other fields constraints

Yes, I need help with setting these parameters.

Hello, Please could me guide me more where do i need to add and which API should I use? <@865531204849500190>

check update assistant api over Vapi docs.