1. When you login to your agent profile for the first time, you need to make sure that you allow your mic on Google Chrome
2. From your Ziwo agent page, click on your profile icon on the upper right of the screen and select profile, then select "Sounds and Device" and make sure that the default audio and Mic drivers are showing in their relative fields.
It is recommended to connect a headset in order to be able to make and receive calls, related headset drivers should show. If you are going to make and receive calls from your machine then the machine drivers should show. In case the drivers were not showing then you won’t be able to make and receive calls and you need to check with your IT team.