combining of high frequency local area network communication on the same electrically conducting media with low frequency telephony data is a form of frequency domain multiplexing in the latter two alternatives each in wall telephone outlet is replaced with a sic based outlet having both a telephone jack and one or more communication jacks the sic network can be used as a computer bus extender such as an u2018 isa bus extender u2019 as illustrated in fig1 in this configuration a sic 1006 is equipped with a computer bus connector 1004 which is connected for example to one of the isa bus slots in a computer 1002 to transport data between the local area network and computer 1002 another sic 1010 remotely located also has a computer bus connector 1012 such as an isa bus extender this allows for a transparent isa bus capability where the isa bus data will be transported in both directions over electrically conducting medium 1008 the ellipses indicate that additional sic 39 s and electrically conducting media may be present in the local area network between sic 1006 and sic 1010 shown as an example a video frame grabber card 1014 is plugged into computer bus connector 1012 and a video camera 1016 is connected to video frame grabber card 1014 normally video frame grabber card 1014 is plugged directly into an isa bus slot such as in computer 1002 here however the local area network acts.