A system and method for transmitting and restoring an optical signal in an optical ring is presented. The listening module also transmits the wireless frequencies to a monitoring module connected to head end equipment of the DAS. The second mask layer is selectively deposited onto the film, but not to the printed mask. If a sharp object penetrates the elastic panel, it will not puncture the inner air cell unless it can also pierce the protective bag non-elastic layer. If the message request is a special message request, it may be dispatched to the second stage. Therefore, the first and the second contact terminals can be easily soldered on a printed circuit board and entirely contact with contact pads of the electronic cards.