Voicemail detection is not working, ended reason is set to No Answer

scattered-teal · 2025-11-26T18:13:24.880Z

Call ID: 019ac138-e4c0-7556-baeb-ea9dd6a7d7f8 Org ID: 14d31e07-98c4-4f99-aefd-4d35ed5baa80 Can we figure out why voicemails are not being left? I have : voicemailDetection: { provider: 'vapi', }, When making the calls

V

Vapi Support BotAPP•11/26/25, 6:14 PM

Your current configuration is missing required parameters for Vapi voicemail detection. Update your config as follows:

voicemailDetection: {
  provider: 'vapi',
  backoffPlan: {
    maxRetries: 5,
    startAtSeconds: 2,
    frequencySeconds: 2.5
  },
  beepMaxAwaitSeconds: 12
}

voicemailDetection: {
  provider: 'vapi',
  backoffPlan: {
    maxRetries: 5,
    startAtSeconds: 2,
    frequencySeconds: 2.5
  },
  beepMaxAwaitSeconds: 12
}

voicemailDetection: {
  provider: 'vapi',
  backoffPlan: {
    maxRetries: 5,
    startAtSeconds: 2,
    frequencySeconds: 2.5
  },
  beepMaxAwaitSeconds: 12
}

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

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

S

scattered-tealOP•11/26/25, 6:50 PM

Those are optional fields are they not? @Vapi Support Bot

V

Vapi Support BotAPP•11/26/25, 6:51 PM

Yes, those fields are optional, but you must set a

voicemailMessage

voicemailMessage

voicemailMessage

voicemailMessage for voicemails to be left—otherwise, the assistant will hang up even if voicemail is detected. Try adding this to your config:

voicemailDetection: { provider: 'vapi' },
voicemailMessage: "Your voicemail message here"

voicemailDetection: { provider: 'vapi' },
voicemailMessage: "Your voicemail message here"

voicemailDetection: { provider: 'vapi' },
voicemailMessage: "Your voicemail message here"

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

S

scattered-tealOP•11/26/25, 8:22 PM

Figured out the problem, had a bug in including a voicemail message on my end. Mark this as solved.

V

VapiAPP•11/28/25, 12:53 AM

Hi SlaviSavanovic,

It looks like you're inquiring about voicemail detection. To configure voicemail detection with Vapi, you have several options and customizations:

Voicemail Detection Providers: Choose between Vapi, Google, OpenAI, or Twilio for your detection method. Each has unique strengths, such as Vapi for speed and accuracy, or Google for audio precision.
**Configuration Options**:
- Provider: Select your provider with the
```
provider
```
```
provider
```
  property.
- Detection Type: Specify
```
audio
```
  audio
```
audio
```
  audio
  for native audio models or
```
transcript
```
```
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
```
  startAtSeconds
```
startAtSeconds
```
  startAtSeconds
  ,
```
frequencySeconds
```
  frequencySeconds
```
frequencySeconds
```
  frequencySeconds
  , and
```
maxRetries
```
  maxRetries
```
maxRetries
```
  maxRetries
  for optimal detection balance between speed, accuracy, and cost.
**Best Practices**:
- For sales outreach, use Vapi with
```
startAtSeconds: 2
```
  startAtSeconds: 2
```
startAtSeconds: 2
```
  startAtSeconds: 2
  ,
```
frequencySeconds: 2.5
```
  frequencySeconds: 2.5
```
frequencySeconds: 2.5
```
  frequencySeconds: 2.5
  , and
```
beepMaxAwaitSeconds: 25
```
  beepMaxAwaitSeconds: 25
```
beepMaxAwaitSeconds: 25
```
  beepMaxAwaitSeconds: 25
  .
- For customer support, Google is recommended for precision with settings like
```
startAtSeconds: 3
```
  startAtSeconds: 3
```
startAtSeconds: 3
```
  startAtSeconds: 3
  and
```
maxRetries: 8
```
  maxRetries: 8
```
maxRetries: 8
```
  maxRetries: 8
  .

For specific setups, refer to the Voicemail Detection documentation for complete configuration examples and further guidance.

Voicemail Detection | Vapi

Voicemail detection is not working, ended reason is set to No Answer

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