Patent ID: 7990996

Claim:
A data transmission network having at least two devices to transmit and receive data, said network comprising: a passive transmission device to which each of said devices is connected so that the data is transmitted between said devices over said passive transmission device, wherein the passive transmission device has an operational frequency that is lower than an operational frequency of the devices; and, each of said devices includes a converter to control data transfer over said passive transmission device to be compatible (i) from each of said devices to said passive transmission device, (ii) between each of said devices, and (iii) to be received by said devices from said passive transmission device, wherein the data transmitted from and received by said devices is assembled in data packets, each of the data packets including preamble information, and each of said converters replaces the preamble information of each data packet to be transmitted from said device that includes said converter with a variable bit pattern generated for said device, and wherein collision of two of the data packets are detected by comparison of a transmitted data packet and a received data packet.