> ## Documentation Index > Fetch the complete documentation index at: https://docs.subverseai.com/llms.txt > Use this file to discover all available pages before exploring further. # Voice Agent Configuration > Full configuration reference for Voice Agents ## Identity | Field | Type | Default | Description | | ------------ | -------- | -------------- | -------------------------------------------------------------------------------------------------------------------- | | Name | Text | — (required) | Unique identifier. Lowercase letters, numbers, and underscores only (e.g. `sales_caller`). Must start with a letter. | | Description | Text | `""` | Internal description of what this agent does. | | Architecture | Dropdown | `Prompt Based` | **Prompt Based** uses a system prompt. **Conversational Flow** uses a visual node-based builder. | | Debug Mode | Toggle | Off | Outputs extra internal reasoning logs. Use during development; disable in production. | *** ## Agent Settings | Field | Type | Default | Description | | ---------------- | --------- | ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Greeting Message | Text | `""` | What the agent says when the call connects. Leave blank if the caller speaks first. | | Greeting Type | Dropdown | `Prompt` | **Prompt** — agent generates the greeting dynamically based on context. **Say** — agent reads exactly what you typed, word for word. | | Who Speaks First | Dropdown | `SubVerseAI Agent` | **SubVerseAI Agent** — agent speaks first (outbound style). **User** — agent waits for the caller to speak (inbound style). | | System Prompt | Text area | Empty | The main system prompt. Define the agent's identity, role, tone, capabilities, and rules. Use the **Refine using AI** button to get AI assistance writing or improving the prompt. | *** ## Large Language Model Preferences | Field | Type | Default | Description | | -------------- | -------- | ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | LLM Model | Dropdown | — (required) | The AI model powering this agent. Each model shows its speed and reasoning ratings. | | Thinking Level | Dropdown | `Default` | Extended reasoning depth before responding. Options: **Default**, **Low**, **Medium**, **High**, **Very High**. Higher = better reasoning but slower and more expensive. | | Max Tokens | Number | None | Maximum tokens the LLM can generate per response. Leave blank to use the model's default. | | Temperature | Slider | `0.5` | Response creativity. `0.0` = consistent and precise. `1.0+` = more varied and creative. | *** ## Speech Detection Settings | Field | Type | Default | Description | | ----------------------------- | -------- | ------------ | -------------------------------------------------------------------------------------------------------------------------------------- | | Transcript Model | Dropdown | — (required) | The speech-to-text model used to transcribe the caller's speech (e.g. Deepgram Nova 3). | | Transcript Language | Dropdown | — (required) | Language for transcription (e.g. English (US), English (India)). | | Custom Keywords | Text | None | Words or phrases the STT model should pay extra attention to (e.g. product names, brand terms). Separate multiple entries with commas. | | Smart Format | Toggle | Off | Automatically format numbers, currencies, dates, and addresses in transcripts (e.g. "twenty dollars" → "\$20"). | | Numerals | Toggle | Off | Convert spoken numbers into digits (e.g. "five" → "5"). | | Allow Interruptions Overall | Toggle | On | Whether the caller can interrupt the agent mid-sentence. Turn off for strict scripted playback. | | Allow Interruptions Initially | Toggle | Off | Whether the caller can interrupt the very first message the agent speaks. Useful for letting eager callers skip the intro. | | Interruption Sensitivity | Slider | `2` | How easily the agent is interrupted. Higher = more sensitive. Range: 0–4. | *** ## Voice Settings | Field | Type | Default | Description | | -------------------------------- | -------- | ------------ | ---------------------------------------------------------------------------------------------------- | | TTS Model | Dropdown | — (required) | The text-to-speech model for generating speech (e.g. ElevenLabs Flash V2.5). | | TTS Language | Dropdown | — (required) | Language for speech synthesis (e.g. English (US)). | | Gender | Radio | None | Filter voices by **Male** or **Female**. Optional. | | Voice | Dropdown | — (required) | The specific voice to use. Click **Browse** to preview available voices from the selected provider. | | Speed | Slider | `2` | Speaking speed. Higher = faster. Range: 0–3. | | Voice Stability (Expressiveness) | Slider | `0.5` | How consistent the voice sounds. Lower = more expressive and varied. Higher = very consistent. | | Similarity Boost | Slider | `0.8` | How closely the voice matches its original model. Higher = more faithful but may sound less natural. | | Voice Pitch | Slider | `2` | Voice pitch adjustment. Range: 0–4. | | Voice Volume | Slider | `2` | Output volume level. Range: 0–4. | *** ## Call Settings | Field | Type | Default | Description | | ---------------------- | -------- | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Communication Method | Dropdown | `Two Way` | **Two Way** — agent speaks and listens. **One Way** — agent only speaks (e.g. announcements). | | DTMF Enabled | Toggle | Off | Enable touch-tone input. The agent can detect digit presses (e.g. "Press 1 for sales"). | | Background Ambient | Toggle | Off | Play subtle background audio (e.g. office sounds) to make calls feel less robotic. | | Background Thinking | Toggle | Off | Play a brief sound while the agent is generating a response, signaling to the caller that something is happening. | | Transfer To | Text | None | SIP URI or phone number to transfer the call to when a transfer is triggered. | | Display Phone Number | Radio | `Show Agent Number` | **Show Caller Number** — displays the caller's number to the recipient. **Show Agent Number** — displays the agent's number. | | Transfer Type | Radio | `Cold Transfer` | **Warm Transfer** — agent introduces the caller before transferring. **Cold Transfer** — call is transferred immediately without introduction. | | Warm Transfer Prompt | Text | `""` | The message the agent reads during a warm transfer (e.g. "I have a customer calling about a billing issue"). Only applies when Transfer Type is **Warm Transfer**. | | Whisper | Toggle | Off | The agent can hear the caller but the caller cannot hear the agent. Useful for live coaching scenarios. | | Silence Time | Number | `8` | Seconds of caller silence before a silence action is triggered. | | Silence Turns | Number | `2` | Consecutive silence events before the agent takes action. | | Max Duration | Number | `600` | Maximum call length in seconds. The call ends automatically at this limit. | | Silence Prompt | Text | `""` | What the agent says when a silence timeout occurs (e.g. "Are you still there?"). | | Agent Responsiveness | Slider | `4` | Overall responsiveness after end-of-turn is detected. Higher = responds more quickly. Range: 0–4. | | Preemptive Response | Toggle | On | Agent starts generating a response before the caller fully finishes speaking. Significantly reduces perceived latency. Turn off only if you need strict full-turn capture. | | Session Timeout (mins) | Number | None | Minutes of inactivity after which the call session ends automatically. Leave blank for no timeout. | *** ## Agent Transfers | Field | Type | Default | Description | | ------------- | -------- | ------- | -------------------------------------------------------------------------------- | | Select Agents | Dropdown | None | Other Subverse agents this agent can transfer the conversation to during a call. | *** ## Knowledgebase Settings | Field | Type | Default | Description | | -------------- | -------- | ------- | ------------------------------------------------------------------------------------------- | | Knowledge Base | Dropdown | None | Attach a Knowledge Base so the agent can look up answers from your documents during a call. | *** ## Function Settings | Field | Type | Default | Description | | ----------------- | ------------ | ------- | -------------------------------------------------------------------------------------------------------------------------------- | | Pre Call Tools | Multi-select | Empty | LLM tools that run automatically before the call starts (e.g. fetch customer account info). | | During Call Tools | Multi-select | Empty | Tools the agent can call mid-call based on the conversation (e.g. look up order status, book an appointment, transfer the call). | | Post Call Tools | Multi-select | Empty | LLM tools that run automatically after the call ends (e.g. update CRM, send an SMS follow-up). | *** ## Agent Security Settings | Field | Type | Default | Description | | ---------------------------- | --------- | ------- | ---------------------------------------------------------------------------------------------------------------------------- | | Allow List (Allowed Callers) | Text area | Empty | Regex patterns for phone numbers allowed to interact with this agent, separated by commas. Leave empty to allow all callers. | | Block List (Blocked Callers) | Text area | Empty | Regex patterns for phone numbers that are blocked, separated by commas. Takes priority over Allow List. | *** ## Post Call Data Analysis After each call, the agent can automatically analyze the transcript and extract structured data. | Field | Type | Description | | ---------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------------------- | | LLM Model | Dropdown | The AI model used to run the post-call analysis. Can differ from the main agent model. | | Parameters | Form / JSON | Define the data points to extract from each call. Switch between **Form** (add parameters one by one) and **JSON** (paste a raw JSON schema). | **Parameter fields:** | Field | Description | | -------------- | -------------------------------------------------------------------- | | Parameter Name | The key name for this data point (e.g. `summary`, `user_sentiment`). | | Details | Description of what this parameter represents and how to extract it. | | Type | Data type: `string`, `boolean`, `number`, etc. | | Required | Whether this parameter must be present in every analysis output. |