Google Voice can be used
to make free PC to phone
calls and free PC to PC
calls.
The easiest and
most common way to use
Google Voice, however, is
to allow the service to
connect your phone to the
destination number for
free. I suppose you could
call this a free "phone
to phone" call.
You can sign up for
Google Voice for free
here using your
Google Account, the same
information you use to
access other Google
services.
Click on the
Get a Google
Number button to
get your free phone
number so you can start
making free phone calls!
Google Voice is only
open to those in the US.
To use Google Voice to
make free phone calls,
log in to Google Voice
and click the
Call button.
Enter a US or Canadian
number in
Number to
call, choose a
Phone to call with
(this is your home or
mobile number you told
Google about when you
signed up), and then
click
Connect.
Google will dial the
number you entered and
connect the call to you
for free.
To use Google
Voice to make free PC to
phone calls, install the
Google Chat video and
voice plug-in
here. Once installed,
you can make free calls
from Gmail to real phones
using just your PC
microphone and speakers.
Google Voice can also
be used to make PC to PC
calls, often called
voice chat, using
Google Talk available
here.
You can also use
Google Voice as a web app
from mobile browsers, as
shown in the screenshot
above. Official Google
apps are available for
Android and BlackBerry
users and several
non-official apps are
available for iPhone
users.
Supposedly, an
official Google Voice
iPhone app is in the
works.