🤖 Explain with AI

Voice AI¶

Deploy AI agents that make and receive phone calls. 4Geeks Voice AI uses a native speech-to-speech engine for natural-sounding AI phone agents with real-time conversation capabilities.

Overview¶

Voice AI capabilities:

• Inbound Calls — AI answers incoming calls 24/7
• Outbound Calls — AI makes calls for campaigns, follow-ups, reminders
• Phone Provisioning — Bring your own trunk or get dedicated phone numbers
• Calling Campaigns — Bulk outbound call campaigns with CSV upload
• Custom Voice Cloning — Clone any voice for personalized agent experiences
• Cross-Channel Handoffs — Seamlessly switch between WhatsApp, Voice, and SMS
• Call Analytics — Monitor call duration, outcomes, transcripts, and sentiment

Setting Up Voice AI¶

Step 1: Choose Voice Channel¶

When creating an agent:

1. Open the Agent Studio
2. At the Channel step, select Phone
3. The voice AI configuration options appear

Step 2: Provision a Phone Number¶

1. Click Connect Phone Number
2. Choose a number:
3. Search for a new number — By country code and area code
4. Use an existing number — From your account
5. Bring Your Own Trunk — Register your own phone number via SIP
6. Confirm the number assignment
7. The number is linked to your agent

Step 3: Configure Voice Settings¶

Step 4: Configure AI Model¶

4Geeks Voice Engine¶

4Geeks Voice AI is powered by our proprietary native speech-to-speech engine. Unlike traditional architectures that chain separate speech-to-text, LLM, and text-to-speech services, our engine processes voice conversations end-to-end for lower latency and more natural interactions.

Built-in Voices¶

Five professionally crafted voices are available out of the box:

Custom Voice Cloning¶

Create custom voices tailored to your brand:

1. Navigate to Voice Cloning in the AI Agents section
2. Click Record Your Voice
3. Read the provided script (or record your own)
4. Name your voice and select a language
5. Click Clone Voice
6. The cloned voice is available for use across all your agents

Cloned voices support English, Spanish, Portuguese, and French.

Learn about Voice Cloning

Phone Number Registration (BYO Trunk)¶

Register your own phone numbers with the platform:

1. Navigate to Channels
2. Click Register Phone Number
3. Provide your SIP trunk details:
4. SIP URI — Your telephony provider’s SIP address
5. Authentication — IP allowlist or SIP digest credentials
6. The number is verified and linked to your workspace

Server-Side Tools¶

Voice agents can execute tools during calls:

Tools are configured per agent and executed automatically when the AI detects the need during a conversation.

Outbound Calling Campaigns¶

Create and manage bulk outbound call campaigns.

Creating a Campaign¶

1. Navigate to the Campaigns tab in AI Agents
2. Click Create Campaign
3. Configure:
4. Campaign Name — Descriptive name
5. Agent — Which voice agent to use
6. Phone List — Upload a CSV of phone numbers
7. Schedule — When to make calls (immediate or scheduled)
8. Concurrency — How many calls simultaneously
9. Click Launch Campaign

CSV Format for Phone Lists¶

phone_number,customer_name,notes
+15551234567,John Doe,Follow up on quote
+15559876543,Jane Smith,Appointment reminder
+15555555555,Bob Wilson,Payment reminder

Campaign Dashboard¶

Monitor campaign performance:

Campaign Status¶

Campaign Controls¶

• Pause — Stop making new calls (in-progress calls continue)
• Resume — Continue from where the campaign paused
• Cancel — Stop the campaign entirely
• View Logs — See individual call results

Call Logs¶

Each call in a campaign is logged:

Phone Number Management¶

Viewing Connected Numbers¶

1. Navigate to the Channels tab
2. View all connected phone numbers:

Disconnecting a Number¶

1. Navigate to Channels
2. Find the phone number
3. Click Disconnect
4. Confirm

The number is released and can be reassigned later.

Call Quality¶

Voice Engine Performance¶

The 4Geeks Voice Engine is optimized for natural, low-latency conversations:

Call Analytics¶

Every call is tracked with structured analytics:

Learn about Agent Analytics

Cross-Channel Handoffs¶

Voice agents can seamlessly hand off conversations to other channels when needed:

• Voice to WhatsApp — When a customer prefers text chat
• Voice to SMS — When WhatsApp is unavailable
• WhatsApp to Voice — When a customer requests a phone call

Handoffs are triggered automatically when the AI detects channel-switch intent, or can be configured per agent.

Learn about Cross-Channel

Billing¶

Voice AI calls consume tokens from your agent balance:

Auto-refill ensures your agents never stop mid-call.

Best Practices¶

1. Write clear prompts — Voice agents need concise, conversational prompts
2. Set expectations — The first message should clearly state it’s an AI
3. Test thoroughly — Use the playground before deploying to production
4. Monitor transcripts — Review call logs to improve agent performance
5. Start small — Begin with a small campaign, then scale up
6. Use custom voices — Brand-specific voices improve customer trust

What’s Next¶

• Voice Cloning — Create custom voices for your agents
• Cross-Channel — Orchestrate conversations across channels
• Agent Analytics — Monitor agent performance
• Knowledge Base — Add domain knowledge to voice agents
• Website Analysis — Auto-generate voice agent prompts

Still questions? Ask on Discord or explore tutorials