A system for pairing two devices includes a monitoring system and a server. The flat panel loudspeaker forms a portion of an exterior surface of the sound panel and is operably coupled to the portable electronic device to selectively produce sound. The invention can be achieved in not only the network equipment, but also the network analysis system. The guide rod is moves so that the flexible member is maintained in a taut state in all positions of the frame part. The highest-quality mapping is then selected in dependence on the calculated indicators, and the set of optimisation parameters generated for the selected mapping is selected.