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

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Prerequisites

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

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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

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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

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Step 3: Configure in Rounded

In Rounded, add your phone number:

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SIP Trunk Settings

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

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Phone Number

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

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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

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Troubleshooting

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

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