SlaviSavanovic
11/26/2025, 6:13 PMVapi Support Bot
11/26/2025, 6:14 PMjavascript
voicemailDetection: {
provider: 'vapi',
backoffPlan: {
maxRetries: 5,
startAtSeconds: 2,
frequencySeconds: 2.5
},
beepMaxAwaitSeconds: 12
}
This should enable proper voicemail detection and resolve the "No Answer" issue. For more details, see the documentation I have found.
Source:
- [Voicemail Detection Documentation](https://docs.vapi.ai/calls/voicemail-detection)SlaviSavanovic
11/26/2025, 6:50 PMVapi Support Bot
11/26/2025, 6:51 PMvoicemailMessage for voicemails to be left—otherwise, the assistant will hang up even if voicemail is detected. Try adding this to your config:
javascript
voicemailDetection: { provider: 'vapi' },
voicemailMessage: "Your voicemail message here"
This should resolve the "No Answer" issue if voicemail detection is working as expected.
Source: [Voicemail Detection Documentation](https://docs.vapi.ai/calls/voicemail-detection)SlaviSavanovic
11/26/2025, 8:22 PMChiranjeet Mishra
11/28/2025, 12:53 AMprovider property.
- **Detection Type**: Specify audio for native audio models or transcript for ASR-based detection.
- **beepMaxAwaitSeconds**: Set this to control how long to wait for a beep before starting your message. Recommended default is 30 seconds.
- **backoffPlan**: Customize startAtSeconds, frequencySeconds, and maxRetries for optimal detection balance between speed, accuracy, and cost.
3. **Best Practices**:
- For sales outreach, use Vapi with startAtSeconds: 2, frequencySeconds: 2.5, and beepMaxAwaitSeconds: 25.
- For customer support, Google is recommended for precision with settings like startAtSeconds: 3 and maxRetries: 8.
For specific setups, refer to the [Voicemail Detection documentation](https://docs.vapi.ai/calls/voicemail-detection) for complete configuration examples and further guidance.