Sending and Receiving Page-Mode Messages
An application can begin sending messages in page mode after a RealTimeEndpoint instance is created and registered, provided that the endpoint is an instance of the SipEndpoint class. The application on the sending side can send a message synchronously (using SendMessage()) or asynchronously (using BeginSendMessage() and EndSendMessage(IAsyncResult). Page-mode messages are delivered only when the recipient endpoint is online and has subscribed to the MessageReceived event.
The topics in this section describe how to send page-mode messages synchronously and asynchronously, and how to receive page-mode messages.