1. DTMF (Navigate IVR)

Guide the voice agent through IVR systems with button presses (e.g., “Press 1 to reach support”).

See Doc

2.  Voicemail Handling

• You could set up the voicemail when calls reach the voicemail.
• Dashboard only, not available for API.

3. SIP Trunking Integration

You can now integrate Retell AI with your telephony providers, using your own phone numbers (e.g., Twilio, Vonage). This works with both Retell LLM and Custom LLM.

Integration options:

• Elastic SIP trunking
• Dial to SIP Endpoint

See Doc

4. Multilingual Agent (English & Spanish)

You could make a multilingual agent who could speak English and Spanish at the same time.

See Doc

5. Pronunciation

You can also control how certain words are pronounced. This is useful when you want to make sure certain uncommon words are pronounced correctly.

See Doc

6. Voice model selector

We’ve added new settings for voice model selection:

• Turbo v2.5: Fast multilingual model
• Turbo v2: Fast English-only model with pronunciation tag support
• Multilingual v2: Rich emotional expression with a nice accent.

‍