Push to talk over cellular (PoC) server

Push to talk is implemented on 2.5G networks. Using VoIP, it is a technology that merges circuit-switched networks and packet communication. By using Push to talk on their cell-phones, users would communicate in packets instead of any channel being reserved. This paper discusses a prototype implementation of a Push to talk server as a Java application. Using the server, clients can register and communicate through the Internet. The server also provides call-initiation and call-termination facility. The functional implementation of the server is divided so that features can be added to it to make it accommodate functionality such as call-redirection, one-to-many conversations and presence information in the near future. In its present implementation, the server supports one-to-one communication. However, the implementation can be easily adapted for one-to-many communication.