SCS-PTC-R solution is a mutimedia system based on wireless data network realized by VoIP technology. It is different from traditional two way radios. It has no distance limitations and can be used wherever there is cellular network. In addition, the system can also provide users with a multifunctional integrated dispatching system in combination with GPS, multimedia applications or other SAAS services. The system can easily realize real-time PTT call, PTT audio recording, GPS positioning, and other dispatching functions globally. The system is powerful, easy to use, simple to install, and with low cost.