In the mobile Internet protocol (Mobile IP) the mobility agent is a router supporting the redirection of the mobile Internet traffic point when its condition regarding the home network is changing.
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.