> For the complete documentation index, see [llms.txt](https://limechatai.gitbook.io/limechat-product-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://limechatai.gitbook.io/limechat-product-guide/whatsapp-marketing/flows/action-nodes/start-telephony-call-async.md).

# Start Telephony Call (Async)

**Action Node: Start Telephony Call (Async)**

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#### Node Name

Start Telephony Call (Async)

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#### What it does

Initiates an automated outbound phone call to the user during an ongoing conversation using a configured voice agent.\
The call runs **asynchronously**, meaning the flow continues without waiting for the call to complete. Call results (status, summary, transcript) are returned later as outputs.

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#### When to Use

* To trigger automated voice calls for order verification, reminders, or follow-ups<br>
* When you want a voice bot to speak and interact with users over a phone call<br>
* In scenarios where the flow should not pause while the call is happening<br>
* For scalable outbound calling without human intervention<br>

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#### UI Inputs

* **Name**
  * Type: Text (Event Field mapping)<br>
  * Required: No<br>
  * Description: Identifier or label for the call (can be mapped dynamically from flow data)<br>
  * Special Behavior: Supports dynamic values from trigger events<br>
* **CRM Inbox**
  * Type: Dropdown (server-fetched list)<br>
  * Required: No<br>
  * Description: Selects the CRM inbox associated with this call<br>
  * Special Behavior:
    * Options are fetched dynamically<br>
    * Refresh button available to reload latest inboxes<br>
* **Voice Agent\***
  * Type: Dropdown (server-fetched list)<br>
  * Required: Yes<br>
  * Description: Selects the voice bot that will make and handle the call conversation<br>
  * Special Behavior:
    * Dynamically fetched list of available voice agents<br>
    * Refresh option to fetch latest agents<br>
* **Registration Number**
  * Type: Text (Event Field mapping)<br>
  * Required: No<br>
  * Description: Additional identifier (e.g., order ID, user ID) passed into the call context<br>
  * Special Behavior:
    * Supports dynamic mapping from trigger event fields<br>

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#### Outputs

* **successful**
  * Type: Boolean<br>
  * Meaning:
    * true → Call was successfully initiated<br>
    * false → Call initiation failed<br>
* **call\_id**
  * Type: Text<br>
  * Meaning: Unique identifier of the initiated call<br>
* **call\_status**
  * Type: Text<br>
  * Meaning: Current or final status of the call (e.g., initiated, completed, failed)<br>
* **call\_summary**
  * Type: Text<br>
  * Meaning: AI-generated summary of the conversation that happened on the call<br>
* **call\_transcription**
  * Type: Text<br>
  * Meaning: Full transcript of the conversation between the voice agent and the user<br>

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#### Requirements

* **Supported Events:**
  * All events<br>
* **Required Integrations:**
  * None explicitly required (works if telephony + voice agents are configured in the system)<br>

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#### Notes

* This is an **async node** → the flow does NOT wait for the call to finish<br>
* Outputs like summary, transcript, and final status may be populated after the call completes<br>
* Effectively acts as a **voice automation layer** within WhatsApp flows<br>
* Voice Agent configuration is critical — it defines how the call conversation behaves<br>
* Commonly used in:
  * COD order verification<br>
  * Payment reminders<br>
  * Lead qualification calls<br>
  * Re-engagement campaigns