General Settings

Configure the fundamental settings for your AI assistant including call direction, phone numbers, voice selection, and technical parameters.

Quick Start Guide

Ready to set up your first AI assistant? Here's the essential flow:

1. Choose Call Direction: Inbound (answers calls) or Outbound (makes calls)
2. Set Assistant Name: Internal label like "Support Bot" or "Sales Bot"
3. Configure Phone Numbers: Assign platform numbers, SIP, or Caller ID
4. Select Voice & Language: Choose from built-in voices or clone custom ones
5. Adjust Advanced Settings: Fine-tune models, timing, and audio parameters

Call Direction & Basic Setup

Assistant Type

Choose whether your assistant handles inbound or outbound calls. This fundamental choice affects which other options become available.

Inbound (Receive calls): Handles incoming calls from customers. See Inbound calls overview.

Outbound (Make calls): Initiates calls to leads or customers. See Outbound calls overview.

Assistant Name

A descriptive name to identify your assistant in the dashboard. Use something memorable that describes the assistant's purpose (e.g. "Sales Qualifier", "Support Bot", "Appointment Scheduler").

Phone Number Configuration

Your assistant needs a phone number to operate. The available options depend on your call direction choice.

For Outbound Assistants

You can use:

• Platform numbers: Numbers rented directly from our platform
• SIP numbers: Connect your existing VOIP/PBX system
• Caller ID only: Verify ownership of an existing number to display it on outbound calls

For Inbound Assistants

You can use:

• Platform numbers: Numbers rented directly from our platform
• SIP numbers: Connect your existing VOIP/PBX system

Note: Caller ID only numbers cannot handle inbound calls - they only display on outbound calls.

Pricing & Costs

• Platform numbers: Monthly rental fees starting from $3.99/month. See renting a dedicated number for detailed pricing.
• SIP integration: No monthly fee, only $0.00045/min for AI bridging. See SIP integration pricing.
• Caller ID: No monthly fee, region-based per-minute rates (e.g., $0.01/min in the US). See Caller ID pricing.

See Phone number types for detailed explanations and SIP integration guide for VOIP setup.

Engine Type (Voice Processing Mode)

Choose how your AI processes speech and generates responses. Each mode is optimized for different use cases. See Assistant modes for detailed comparisons.

Pipeline Mode

Traditional Speech-to-Text → LLM → Text-to-Speech pipeline. Offers maximum control over voice selection and response generation.

Best for: Complex reasoning, function calling, custom voice requirements

Speech-to-Speech Mode

Direct speech-to-speech generation without intermediate text processing. Provides the most natural conversational flow.

Best for: Quick conversations, natural back-and-forth dialogue

Dualplex Mode (Beta)

Combines fast multimodal processing with premium ElevenLabs voice output.

Best for: Most use cases - recommended default

Language Configuration

Primary Language

The main language your assistant will use for speech recognition and synthesis. This affects:

• Speech recognition accuracy
• Available voice options
• Filler audio phrases
• Voice model selection

See Language support for all available languages and accents.

Secondary Languages

Additional languages your assistant can understand and speak. Useful for:

• Multilingual customer support
• International businesses
• Code-switching conversations

Note: The AI can detect which language the customer is speaking and respond appropriately.

TTS Provider & Voice Selection

TTS Provider

Select your Text-to-Speech provider. Available in Pipeline and Dualplex modes.

Available Providers:

• ElevenLabs - High-quality voices
• Cartesia - Fast, low-latency synthesis

Your assistant can choose from existing voices, clone custom voices, or request voices from the ElevenLabs library.

Voice Options

You have three ways to get the perfect voice for your assistant:

1. Choose from existing voices:

• Professional voices: Pre-trained, high-quality options from ElevenLabs
• Multiple accents: Available for most languages
• Gender options: Male and female voices for each language
• Tone variety: From formal business to casual conversational

2. Clone a custom voice: Create a custom voice by uploading audio samples. Available in Pipeline and Dualplex modes.

Requirements by provider:

• Cartesia - Single audio file, at least 10 seconds, 1 speaker, no background noise
• ElevenLabs - Samples over 1 minute, 1 speaker, no background noise. Max 5 minutes total.

Process:

1. Click "Clone voice" next to voice selector
2. Select provider (Cartesia or ElevenLabs)
3. Choose the voice language
4. Enter a name for your voice
5. Record or upload audio
6. Wait for processing
7. Select your new voice from dropdown

Use cases:

• Brand consistency with company spokesperson
• Personal touch for customer relationships
• Matching voice to specific business persona

3. Request from ElevenLabs library: You can request specific voices from the ElevenLabs public library - contact support to add them to your account. Browse the ElevenLabs Voice Library to discover thousands of professional voices across different languages, accents, and use cases.

See Voice selection guide for detailed setup instructions.

Timezone Configuration

Timezone

Set the timezone your assistant operates in. This affects:

• Time-based variables in conversations
• Appointment scheduling functions
• "Current time" references in system prompts
• Timestamps in call logs and data extraction

Important: Choose the timezone where your business operates or where most customers are located. The assistant will use this for any time-related calculations or scheduling.

Audio Enhancement Settings

Ambient Sound

Optional background sound mixed under your assistant's voice to mask processing delays and create a more natural audio experience.

Options:

• None: No background sound (default)
• Office: Subtle office environment sounds

Volume control: Adjust the level of ambient sound relative to the voice. Lower values are usually better - too much background sound can interfere with speech recognition.

Filler Audio

Short conversational phrases like "mhm", "okay", "I understand" that play during AI processing time. See Filler audio guide for full details.

Language-aware configuration: Filler phrases are automatically set for your selected language:

"Great!", "Perfect!", "Super!"

"Hmm.", "I see.", "Okay."

"Right?", "Really?", "How so?"

"Okay.", "I understand.", "Got it."

Customization: You can edit the default phrases for each category to match your brand voice or regional preferences.

Advanced Settings

LLM Model Selection

Choose the best language model for your assistant's mode. See LLM model selection guide for detailed recommendations.

Recommended models by mode:

Quick selection guide:

• Speed is critical: Use GPT-5 Realtime or Gemini Flash 2.0/2.5
• Rich reasoning needed: Use GPT-4o or GPT-5 Mini with filler audios to offset latency

LLM Temperature

Range: 0.0 - 1.0 | Default: 0.1

Adjust the level of creativity of the AI when generating responses. Lower value yields better function call results.

**More stable:** Predictable responses, better for function calling and business use cases

**More random:** Creative and varied responses, good for casual conversations

Duration Settings

Control timing and call limits to optimize user experience and costs:

**Range:** 7 - 600 seconds | **Default:** 30 seconds

AI will try to re-engage the user if no reply is detected within this time.

**Recommended:** 30-60 seconds for professional calls.

Custom prompt used when the AI tries to re-engage the user after silence.

**Default:** Uses a standard re-engagement phrase like "Are you still there?"

**Customization:** Write a prompt that instructs the AI how to re-engage.

**Examples:**
- "Gently ask if they are still there and if they need more time."
- "Politely check if they have any questions."

Variables like `{customer_name}` cannot be injected directly in this prompt. The AI has access to the conversation history and main system prompt, so it can reference information from there.

Leave empty to use the default re-engagement behavior.

**Range:** 20 - 1200 seconds | **Default:** 600 seconds (10 minutes)

Call will automatically end if this value is reached.

**Recommended:** 5-10 minutes for lead qualification to control costs.

**Range:** 1 - 120 seconds | **Default:** 40 seconds

Call will end if user doesn't reply within this time.

**Recommended:** 30-45 seconds to balance patience with efficiency.

**Range:** 1 - 60 seconds | **Default:** 30 seconds

For how long the call will ring before marking as unanswered. **Good when you want to avoid voicemail by setting a lower value.**

Call Protection Settings

**Default:** Enabled

Filters caller background noise for clearer speech recognition. Turn OFF if experiencing audio clipping.

**Default:** Enabled

Immediately ends call if voicemail is detected during outbound calls (saves costs).

Prompt for the message the AI will say when voicemail is detected before ending the call.

**Default:** Empty (hangs up immediately without leaving a message)

**Use case:** Leave a brief message before hanging up so the recipient knows who called.

**Example:** "Leave a brief voicemail message saying you called and ask them to call back."

Variables like `{company_name}` cannot be injected directly in this prompt. The AI has access to the conversation history and main system prompt, so it can reference information from there.

Only applies when "End Call on Voicemail" is enabled. Leave empty to hang up without a message.

**Default:** Enabled

Records call audio for review and analysis. **Ensure compliance with local recording laws.**

**Range:** 1 - 120 seconds | **Default:** 20 seconds (when enabled)

If enabled, end the call if no first user response within this time. Counts only from call start to first user response.

**Use case:** Detect if anyone actually answered the phone.

Synthesizer Settings

Configure text-to-speech voice parameters for natural-sounding conversations.

Available for: Pipeline and Dualplex modes only. Speech-to-Speech mode uses native voice generation.

Voice Tuning Parameters

Fine-tune your assistant's voice characteristics for optimal performance:

**Default:** Enabled

When enabled, the AI will add emotional cues to the synthesized speech based on the context of the conversation. This makes the voice sound more natural and expressive.

**Effects:**
- Adjusts tone based on conversation context (happy, concerned, empathetic)
- Adds natural inflections and emphasis
- Makes the assistant sound more human-like

Disable if you prefer a more neutral, consistent tone across all conversations.

**Range:** 0.0 - 1.0 | **Default:** 0.7

Lower settings make the voice more expressive but less predictable, while higher settings make it steadier but less emotional.

    Dynamic and varied delivery but less predictable

    Consistent and steady but less emotional range

**Range:** 0.0 - 1.0 | **Default:** 0.5

Determines how closely the AI matches the original voice. Higher settings potentially include unwanted noise from the original recording.

    Cleaner audio but less accurate to original voice

    Accurate to original but may include background noise

**For cloned voices:** Start at 0.5 and increase gradually. Higher similarity can introduce unwanted artifacts from the original recording.

**Range:** 0.7 - 1.2 | **Default:** 1.0

Adjust the speed of the AI's speech for optimal comprehension and user experience.

    Better for complex information or older demographics

    Standard conversational pace for most use cases

    Quick conversations or time-sensitive scenarios

Transcriber Settings

Configure speech-to-text recognition for optimal accuracy and speed.

Available for: Pipeline mode only. Speech-to-Speech and Dualplex modes use integrated transcription.

Provider Selection

Choose the best transcriber for your language and use case. The provider that will be used to transcribe the user speech.

**Accuracy:** ⭐⭐⭐⭐
**Latency:** Slower

Best for highest transcription fidelity when accuracy is critical.

**Accuracy:** ⭐⭐⭐
**Latency:** Faster

Good all-rounder for most languages. Supports multilingual configurations.

**Accuracy:** ⭐⭐⭐
**Latency:** Faster

Solid choice for English and major languages.

Endpoint Configuration

Uses AI to intelligently detect when the caller has finished speaking

**Default:** Traditional voice activity detection

Choose how the AI will detect the end of the user phrase

Voice Activity Detection (VAD)

Control when your assistant starts and stops talking. See Handling interruptions guide for detailed VAD configuration.

**Range:** 0 - 5 seconds | **Default:** 0.5

Adjust the time the AI will wait for the user to speak after the last word. Lower values make the AI faster, higher values are better for long user phrases.

- **0 (Faster):** Quick responses but may cut off callers
- **5 (Slower):** Waits longer, reduces interruptions

How easily the assistant stops when caller talks over it. Controls the sensitivity for detecting when a caller is trying to interrupt.

Require at least N caller words before interrupting assistant.
**Use:** Prevents false triggers from background noise or brief sounds.

**Available for:** Speech-to-Speech and Dualplex modes only

**Range:** 0 - 1 | **Default:** Auto (model decides)

Controls how sensitive the multimodal model is to detecting when the caller has finished speaking. Lower values make the assistant respond faster, higher values wait longer for the caller to finish.

- **Lower (0.3-0.5):** Faster responses, good for quick conversations
- **Higher (0.7-0.9):** Waits longer, better for detailed responses
- **Auto:** Let the model decide based on conversation context

Only visible when using Speech-to-Speech or Dualplex modes.