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Once you have selected your telephony provider, the final step in the Phone Number configuration is defining the acoustic identity of the line. This ensures that when your Voice AI Agent picks up, it sounds exactly like the persona you designed.

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Assigning a Voice Profile

The Voice setting allows you to link a specific Speech Profile to this phone number. This is where you decide if this line handles support queries with a “Calm & Professional” tone or sales calls with an “Energetic & Persuasive” one.
1

Select Voice

Click the Voice dropdown to view your available Speech Profiles. This list includes both the standard system voices and any Custom Speech Profiles you have added (e.g., ElevenLabs or Azure integrations).
2

Audition the Agent

Click the Play icon next to the selected voice to hear a real-time sample.
  • Tip: Always audition the voice to ensure it matches the region. A Voice AI Agent for Indian Languages should use a relevant profile to ensure the accent resonates with local callers.

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Pronunciation Configuration

Even the most advanced Voice Agents can struggle with unique brand names or regional dialect terms. The Pronunciation Words section allows you to attach specific phonetic rules—previously defined in your Word Management library—to this specific phone line.

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Managing Latency vs. Accuracy

Critical Performance Note: Every custom pronunciation word you add forces the AI to check a lookup table before generating speech.
  • Impact: Adding too many words can introduce noticeable latency (lag) before the agent responds.
  • Limit: We recommend adding only essential terms that the AI consistently mispronounces. Do not add common words.

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Best Practices for Pronunciation

When configuring Voice AI Agents for Arabic or Indian Languages, prioritizing the right words is key to maintaining a smooth conversation flow.
ScenarioDo This (Add to List)Avoid This (Do Not Add)
Brand NamesAdd unique company names (e.g., “Verloop” -> “Vur-loop”).Don’t add standard English words unless the local pronunciation is vastly different.
Regional CitiesAdd cities with complex spellings (e.g., “Sharjah” or “Thiruvananthapuram”).Don’t add major global cities (London, Dubai) that models already know.
Cultural TermsAdd specific honorifics or units (e.g., “Lakhs”, “Dirhams”).Don’t add slang that doesn’t impact understanding.

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How to Add Words

  1. Click into the Pronunciation Words field.
  2. Select the specific terms from your global Word Management list that apply to this phone line’s use case.
  3. Test the line to ensure the Voice Agent uses the phonetic mapping correctly without causing awkward pauses.