in the course of an application involving real - time notification of a client by a telephone switching system , a connection between the client and a server is opened . notification messages transmitted from the telephone switching system to the server are adjusted and sent to the client in the format of a programming language code executable by the client &# 39 ; s browser . the programming language codes are subsequently executed by the browser , whereby the respective notification messages are displayed at the client . for transmission of the notification messages from the server to the browser , as streaming method such as http streaming is use so that the connection remains open while notification messages are to be sent . the presented method can be based on standardized protocols , entails little protocol overhead and allows for facile treatment of security issues .