About call phones from Gmail

In addition to sharing voice and video chats with your contacts from computer to computer, you can also place phone calls to any landline or mobile phone number in Gmail.

To get started, you must be signed in to chat and have the voice and video chat plug-in installed.

Simply click the Call phone icon  at the top of your Chat list 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 don't want to see the Call phone icon in your Chat list, you can disable it.