Abstract: Office workers are equipped with a telephone and a desktop computer, the latter including an email system which allows telephony applets to be included in email messages. Thus the recipient of a message which includes an applet might typically be presented with a call back button. When this button is selected, it automatically provides the recipient with a telephone connection through to the sender of the message. This is accomplished by the applet using JTAPI to interact with the appropriate telephony equipment in order to form the desired connection.