A method of communication on a shared media having a plurality of devices coupled thereto, the method including: forming a first portion including information on a property of a data signal and complying with a communication protocol; forming a second portion comprising data that differs from the information on the property provided in the first portion, where the second portion is non-compliant with the communication protocol; forming a third portion comprising an error check character to verify that the data signal is error free, where the error check character is purposefully set to be an incorrect value and otherwise complying with the communication protocol; and transmitting the data signal including the first, second, and third portions on the shared media, whereby a first of the plurality of devices that complies with the communication protocol is configured to reject the data signal due to the purposefully incorrect error check character.