You can join a conference that has already been started by the conference host.
Next to the conference you want to join, click the Join button.
Note: You cannot join a conference until the conference host has started the conference.
Join the Audio
Before joining a conference, you will be asked how you want to join the conference audio: via microphone or listen only. Listen Only allows users to quickly join the conference as a listener only (no microphone check). You will be able to change your audio preference once you've joined the conference.
Chrome Microphone Permissions
If you are using Chrome, you will have to accept a Chrome-specific permission for access to your microphone. This prompt is just below the address bar. Click the Allow button.
Firefox Microphone Permissions
If you are using Firefox, you will have to accept a Firefox-specific permission to access your microphone. Choose your microphone from the Microphone to share drop-drown menu  and click the Share Selected Device button .
Note: If you don't see the list of microphones, click the microphone icon  to the left of the address bar.
It is recommended that you use a headset with a microphone for best audio experience. To ensure your audio is working correctly, complete the private audio echo test. Speak a few words and if you hear audio, click the Yes button . To choose a different microphone and repeat the audio test, click the No button . If you need help with your hardware, click the Question Mark icon .