Appeal No. 2003-2053
Application 08/646,500
application and the conference component. The number of
accessories so stacked can be arbitrarily large. In this way, a
teleconference application with limited functionality can be made
to appear to the user to be quite robust. Moreover, additional
capabilities can be easily added to the system. See page 2 of
Appellant specification.
Figure 4 illustrates a plurality of processes and/or
apparatus which may be operative within telecommunication system
150c. An application program 401, such as a teleconferencing
application, an audio/video server, or a data server,
communicates with conference accessory 404 in the form of
Application Program Interface calls. Each assessory 404-406 is a
derived component which adds some additional capability to the
conference component 400. An accessory 404 receives the
Application Program Interface calls from the application 401 and
events from conference component 406. An accessory claims
Application Program Interface calls and events directed to it,
and forwards those not directed to it. In this way, all events
intended for the application 401 are passed along through the
accessories to the application 401. Similarly, Application
Program Interface calls for the conference component are passed
to the conference component through the accessory stack. See
3
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