Method and system for providing a PoC Box Service in PoC system

A method and a system for providing a PoC(PTT(Push To Talk) over Cellular) box service in a PoC system are provided to dynamically manage an XML(eXtensible Markup Language) document by freely generating, correcting and deleting PoC box service parameters and use a PoC Box service even after a PoC terminal is turned off. An XDMC(XML Document Management Client) transmits a generated PoC box service parameter to an aggregation proxy server by using an HTTP(Hypertext Transfer Protocol) PUT message(500). The aggregation proxy server forwards the received HTTP PUT message to an XDMS(XML Document Management Server), namely, the destination of a corresponding XML document(502). The XDMS stores a parameter for the PoC box service included in the received message and transmits a response message to the XDMC through the aggregation proxy server(504,506). A PoC box XML document management mode is set(507).