According to the present invention a method of asynchronous transmission over a noisy channel is provided. The method comprises at least following steps: providing a data frame comprising at least one start bit, payload data and at least one stop bit, said data frame having a predetermined number of bits, forming a signaling preamble having a predetermined length by using at least said start and stop bit periods of said data frame, building a processed data frame by attaching said signaling preamble to said payload data, said processed data frame having the same predetermined number of bits, and modulating said processed data by using a signaling modulation scheme and transmitting said modulated processed data over said noisy channel. The transmission method can be advantageously implemented for data transmission over DC and/or AC power lines, like for instance in vehicles or cars. Despite of the noise occurred on the data channel the method transmits the data in a robust manner and no need for further error
