3CX trunk not registered
Get outside calls working again.

| What you need | Affects |
|---|---|
| Admin access to the 3CX Admin Console, and your provider's SIP details | All outside calls |
1. Check the trunk
- Re-enter the loginOpen the trunk and re-enter the username and password from your provider.
- Check the serverMake sure the registrar and proxy details match your provider's settings.
2. Check the connection
- Check the internetMake sure the 3CX server can reach the internet.
- Run the firewall checkerRun the 3CX firewall checker from the dashboard, if available.
- Ask your providerAsk them to confirm the account is active and not blocked.
Troubleshooting
| Problem | Likely cause and fix |
|---|---|
| 403 Forbidden | The username or password is wrong. |
| No response | The server address is wrong, or a firewall blocks it. |