This is a computer system, which allows exchanging personal voice messages, delivering of voice information as well as for the processing of transactions linked with private persons, organizations, goods and services, with the help of the ordinary telephone.
IDC projected over 9 billion minutes of voice traffic to travel over worldwide packet networks in 2000, exceeding 135 billion minutes in 2004. Service revenue is projected at 1.6 billion in 2000 and 18.7 billion in 2004.