> For the complete documentation index, see [llms.txt](https://docs.dapta.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dapta.ai/ai-voice-agents/connecting-your-sip-trunk/connect-a-dapta-managed-number.md).
# Connect a Dapta-managed number
Use a Dapta-managed number when you want Dapta to handle the phone number and SIP trunk setup for you. This is the simplest path: buy the number in Dapta, assign it to an agent, then use it for inbound or outbound calls.
{% hint style="info" %}
This is different from connecting your own Twilio account as a SIP trunk. If your company owns the Twilio account or wants calls to route through its own Twilio Elastic SIP Trunking setup, use the bring-your-own SIP trunk guide instead.
{% endhint %}
***
## Before you begin
Make sure you have:
* A **Voice Agent** already created.
* Access to **Voice Agents > Phone Numbers**.
* Enough **Dapta credits** for the monthly number charge shown during purchase.
{% hint style="info" %}
If you do not see the country, area code, or number type you need, contact Dapta Support for help with availability.
{% endhint %}
***
## Connect the number
**Step 1:** Open **Voice Agents > Phone Numbers**.
Click **Buy Phone Number** to open the number marketplace.
Use the Phone Numbers page to verify, purchase, and manage numbers for Voice Agents.
***
**Step 2:** Choose the phone number you want to use.
Search by the available filters, review the monthly credit charge, and click **Buy**. Confirm the purchase when Dapta shows the summary.
For the full buying flow, see:
{% content-ref url="/pages/we5zspVTGdlh8PjAmZVe" %}
[Buying Phone Numbers through Dapta](/ai-voice-agents/buying-phone-numbers-through-dapta.md)
{% endcontent-ref %}
***
**Step 3:** Assign the number to a Voice Agent.
After purchase, select the number, choose the **Voice Agent** that should answer calls, and click **Save Changes**.
***
**Step 4:** Test inbound calling.
Call the purchased number from a real phone. The assigned Voice Agent should answer and follow its configured prompt, tools, and call behavior.
You can also review the inbound call guide:
{% content-ref url="/pages/cBC9eVlBwGis5PgvXSXg" %}
[Inbound Calls and How to Activate Them](/ai-voice-agents/inbound-calls-and-how-to-activate-them.md)
{% endcontent-ref %}
***
**Step 5:** Use the number for outbound calling.
When you place test calls, run campaigns, or use a **Dapta Phone Call** node, select the managed number anywhere Dapta asks for the calling number or **From** number.
For outbound setup details, see:
{% content-ref url="/pages/yn7tfi9GqIKoGvAANXyv" %}
[Verifying an Existing Phone Number for Outbound Calls](/ai-voice-agents/verifying-phone-numbers-in-dapta.md)
{% endcontent-ref %}
{% content-ref url="/pages/0b3T09pM5YAcVQeKKAzF" %}
[Dapta Phone Call](/flow-studio/nodes/dapta-phone-call.md)
{% endcontent-ref %}
***
**Step 6:** Use the number in campaigns when you are ready to call at scale.
Create or open a campaign, assign the Voice Agent that uses the number, and use **Phone Number Rotation** if you want Dapta to rotate through more than one outbound number.
{% content-ref url="/pages/5MPXltpjbRmsnZdLbpCA" %}
[Create a campaign](/ai-voice-agents/how-to-create-your-first-campaign-in-dapta/create-a-campaign.md)
{% endcontent-ref %}
{% content-ref url="/pages/oAicUT9kkH5vABsAXEao" %}
[Managing your campaign](/ai-voice-agents/how-to-create-your-first-campaign-in-dapta/managing-your-campaign.md)
{% endcontent-ref %}
***
## Troubleshooting
| Issue | What to check |
| ------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| The number does not appear after purchase | Refresh **Phone Numbers**. If it still does not appear, contact Support with the purchase time and workspace. |
| Calls to the number do not reach the agent | Confirm the number is assigned to the correct **Voice Agent** and saved. |
| Outbound calls do not use the number you expected | Check the **From** number in the test call, campaign, or Flow Studio configuration. |
| The country or area code is not available | Contact Support for international number assistance. |
---
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