> ## Documentation Index
> Fetch the complete documentation index at: https://docs.callrounded.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Zadarma Configuration

> Simple guide to connect Zadarma with Rounded via SIP trunk

This guide shows you how to connect your Zadarma phone numbers to Rounded using SIP trunk configuration.

## Prerequisites

* Active Zadarma account
* Zadarma phone number
* Rounded account with AI agents

## Step 1: Create SIP Trunk in Zadarma

1. Log in to your Zadarma account
2. Go to **Settings > SIP Connection**
3. Click **"ADD SIP TRUNK"**
4. Configure your SIP trunk settings

<img src="https://mintcdn.com/roundedtechnologies/lAfocITNnbTuXMOc/images/zadarma-sip-interface.png?fit=max&auto=format&n=lAfocITNnbTuXMOc&q=85&s=3f9a1bd932e6f52c90a97b5d7405bccb" alt="Zadarma SIP Connection Interface" width="2030" height="1340" data-path="images/zadarma-sip-interface.png" />

## Step 2: Get SIP Credentials

From your Zadarma SIP connection page, note:

* **SIP Server**: `sip.zadarma.com`
* **Username**: Your SIP login
* **Password**: Your SIP password
* **Port**: `5060`

## Step 3: Configure in Rounded

In Rounded, add your phone number:

### SIP Trunk Settings

* **SIP Server**: `sip.zadarma.com`
* **Port**: `5060`
* **Username**: Your Zadarma SIP username
* **Password**: Your Zadarma SIP password
* **Transport**: UDP

### Phone Number

* **Number**: Your Zadarma number (e.g., +33123456789)
* **Provider**: Zadarma

## Step 4: Test

1. Assign an AI agent to your number in Rounded
2. Call your Zadarma number to test inbound calls
3. Use Rounded to make test outbound calls

## Troubleshooting

**Connection issues**: Verify your SIP credentials are correct
**No audio**: Check firewall allows port 5060
**Call quality**: Try TCP transport instead of UDP

## Support

* 📧 Rounded: [team@callrounded.com](mailto:team@callrounded.com)
* 📞 Zadarma: +44 204 577 00 77