After establishing a connection you will use your computers speakers, built in microphone or a headset (most common) to make and receive calls.

In your Account / User Settings you can add the SIP Web Phone as a “Forwarding Number” for receiving calls. This means the system will ring your Web Phone (Based on settings and sequential order) when you have an inbound call.

You may use the Web Phone to make outbound calls from your computer just as you would a normal phone.