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DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
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What's New?

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September 26, 2025
September 26, 2025
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September 23, 2025

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Voicemail Detection & Handling Improvements

  1. Enhanced Beep Detection: Improve voicemail detection accuracy with CreateVoicemailToolDTO.beepDetectionEnabled specifically for Twilio-based calls. This feature detects the characteristic beep sound that indicates voicemail recording has started.

  2. Workflow Voicemail Integration: Configure comprehensive voicemail handling in workflows with enhanced message and detection capabilities:

    • Workflow.voicemailMessage: Custom messages for voicemail scenarios (up to 1000 characters)
    • Workflow.voicemailDetection: Configurable detection methods for different providers

  3. Assistant Voicemail Enhancement: Improved voicemail handling in assistant configurations with Assistant.voicemailMessage and Assistant.voicemailDetection for consistent behavior across all conversation types.

  4. Multiple Detection Methods: Choose from various voicemail detection providers:

    • Google: GoogleVoicemailDetectionPlan for AI-powered detection
    • OpenAI: OpenAIVoicemailDetectionPlan for intelligent voicemail recognition
    • Twilio: TwilioVoicemailDetectionPlan for carrier-level detection
    • Vapi: VapiVoicemailDetectionPlan for integrated detection

  5. Beep Detection for Call Flows: The new beep detection capability works specifically with Twilio transport, providing reliable voicemail identification when traditional detection methods may not be sufficient.

  6. Voicemail Tool Configuration: Enhanced tool rejection and messaging capabilities ensure appropriate handling when voicemail is detected, with configurable responses based on your business requirements.

Beep detection is currently available only for Twilio-based calls. If you’re using other providers, consider combining multiple detection methods for better accuracy.

Voicemail Management Features

Multi-Provider Detection

Support for Google, OpenAI, Twilio, and Vapi detection methods, allowing you to choose the best option for your use case.

Beep Detection

Advanced audio analysis to detect voicemail beeps on Twilio calls for more reliable voicemail identification.

Custom Messaging

Configure personalized voicemail messages up to 1000 characters for better user experience and brand consistency.

Workflow Integration

Comprehensive voicemail handling throughout workflow nodes with consistent configuration across conversation flows.