interface 40 and i o bus 32 coupled to each other as shown the i o and memory controllers 30 and 26 are also coupled to each other whereas audio interface 36 also has headset 42 and microphone 44 coupled to it fig4 illustrates one embodiment of a mcu 12a 12i and 12x 12y collectively represented by 12 in fig4 mcu 12i is similarly constituted as pcs 14 except mcu 12i includes multiple cpus 50a 50b and multiple levels of cache memory 52a 52b and 56 for improved performance additionally mcu 12i typically does not include headset 42 and microphone 44 except for the manner the elements in fig3 amp 4 are used they are intended to represent a broad category of similar elements found in many computer systems whose constitutions and functions are well known and will not be otherwise further described the manner these elements are used under the present invention will be described in detail below with additional references to the remaining figures fig5 illustrates the key software elements of exemplary pcs 14 and mcu 12 as shown pcs 14 and mcu 12 include operating system 70 and 70 39 having device drivers 74 and 74 39 respectively preferably operating system 70 further includes windowing subsystem 72 any number of operating systems well known in the art may be used for operating systems 70 and 70 39 pcs 14 and mcu 12 39 further include applications 76 and 76 39 respectively application 76 includes personal conferencing manager pcm 78 having data routing matrix management functions and data transmission function whereas application 76 39 includes multi point conferencing manager mcm 80 having complementary data routing matrix management functions and data transmission function which will be described in more detail below as will.