Well no, not exactly although you
could within minutes.
Every computer that
connects to the internet has the ability to use VoIP providing the
minimum specifications for VoIP services
However, if you are paying for phone calls either
local or international then VoIP can save you a packet so seriously
consider setting it up.
what do I need to
get started with VoIP article goes into
detail with regard what you will need, chances are you've got most of it
anyway so getting started with VoIP will probably cost you nothing at all.
So, no you probably havn't but yes you probably