The invention refers to a method and an arrangement for signal processing for a target detecting device where a return signal is divided into two parallel branches where a first compression filter compresses the signal in the first branch and where a second compression filter compresses the signal in the second branch. One or more methods include encoding data using linear error correcting code, modulating the encoded data, writing the modulated data to memory, and decoding the written data using a Viterbi algorithm and a linear error correcting code decoder. The other ends of the interface pins are fit into holes in an another substrate. A user may use the device when they are in range of another wireless access point in a public or private building that also is connected to their communications service provider’s broadband packet data network. Further disclosed are embodiments of systems and methods that may be configured to deliver strobe control signals andor strobe color control signals over a two-wire fire system powerline. The role is capable of revealing said user’s relationship to said certain message.