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

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

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