Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free. You can also call ordinary telephone numbers anywhere in the world if you sign up to a gateway service. It uses the SIP protocol and is compatible with most major VoIP SIP service providers.Requirements: • A soundcard • One of the following: • A headset with mic (to purchase click here). • A microphone and a set of speakers. • A USB phone (to purchase click here).