Greeting - the caller will hear a greeting during the call. The function can be met, when calling to different companies, in most cases after the greeting follows a request, to which department or person the call has to be directed to.
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.