Quality of Service for VoIP
 

    - The QoS of VoIP is

        between "the old-telco killer app" and "a toy for long distance lovers" [1]

    - The real-time speech data can be dropped or arrive too late,

        because the Internet has been designed to support non-real-time data communications

    - To minimize the problem,

        (1) the packet-loss modeling, and

        (2) the packet-loss recovery techniques

       are needed.