You will need to have installed and activated the voice and video plug-in if you haven’t already done so. If you don’t see this “call phone” line near chat it may be because Google has not yet enabled your Gmail account for this service. They began rolling this out on August 25, 2010 and will require at least several days to activate all accounts. If you don’t see this “call phone” line near chat it may be because your Gmail language setting is different than ‘English’, it is visible for ‘English’ only.
The box explains what the service is, that US/Canada calls are free in 2010, and that emergency calls cannot be made via Google Voice.
Enter either a phone number or the name of a contact. Use the dial pad to enter numbers, or just type in a name. If you make a mistake when entering a number on the dial pad, just use the delete button of your keyboard.