Voice over internet protocol or VoIP is a revolutionary technology in making a phone call over the internet access. There are many providers that can be found in the web site that is offering low rate VoIP even though we are making a phone call to international or any long distance phone calls. PC-to-PC phone call using VoIP is the most commonly use system in VoIP technology. There are certain specification that we should use that can help low rate VoIP.