coupled personal computer or a laptop computer with an existing videoconferencing system the systems and methods of the present invention find particular applicability in the context of the viewstation u2122 a videoconferencing system manufactured by polycom inc of milpitas calif as further described below dual stream communication enables control signals from the videoconferencing system to control applications on an integrated personal computer fig1 shows a coupling device 100 including a card 110 for insertion into the pcmcia slot of a laptop computer not shown card 110 includes firmware for launching software which is written into ram of the laptop computer and executes as described below card 110 is coupled to an rj 9 connector 130 in an exemplary embodiment by a cable 120 rj 9 connector 130 is preferably coupled to an available port of a microphone pod not shown that is in turn coupled to a videoconferencing system not shown such coupling provides a signal path between the integrated laptop computer and the videoconferencing system referring to fig2 installing card 110 into the integrated laptop computer and launching an application provided by card 110 displays an interface 200 on a screen of the laptop computer interface 200 includes a plurality of buttons including a show pc button 210 a magnify button 220 and a stop button 230 by selecting interface 200 by for example with a mouse or similar user input device clicking on the interface 200 a user is enabled to give a presentation loaded in.