Making calls: Using the Dialer Application makes calling as easy as dialing directly from your cell phone. Note: As of now, users are not able to select an international Google number or forward their calls to an international number.
Note: Users need to be signed in to Chat and have the voice and video chat plug-in installed.
Step 1: Click the Call phone link at the top of your Chat roster to open up the Call window. From the Call window, you can dial a phone number, view your call history, or add credit if you'd like to place an international call.
Step 2: In the chat window, click the camera icon to make a video call or the phone icon to make a voice call.
Receiving calls: A user is able to get all their calls through a single number. All that is required by the user is to click the Settings link on the right side of the page, and click the Phones tab to change the phone settings. Here, users will be able to add the numbers they want to forward from.
Note: In the Phones tab, click the check box next to Google Chat.