Use 3CX on your computer
Make and take calls from your web browser.

The 3CX web client works in Chrome or Edge, so there's nothing to install.
Steps
- Open the web client link from your welcome email.
- Log in with the extension number and password from the email.
- Allow microphone and notification access when your browser asks.
- Click the dial pad to make a call, or answer incoming calls from the pop-up.
- Use a headset for the best sound.