A method is provided for handling a call communication session via a communication address associated with a private network using Unstructured Supplementary Service Data (USSD) protocol. USSD messages are used between the wireless private network subscriber and a wireless network to provide the subscriber with information about the caller, and routing options of the call. The subscriber can also inform the wireless network using USSD messages how to proceed with the call. USSD messages such as but not limited to, transferring the call to another subscriber with canned messages, transferring the call to a subscriber's voice mail, establishing a conference call, swapping to other call, creating new call, consulting with other person, transferring to specific predefined person, hold, consulting with other person via canned message, etc. Another method is exchanging the device status information using USSD messages.