The invention may in combination modularized circuit component capable of preventing damage and destroy the subscriber matching circuit from a lightning stroke or a fault in the TDX exchange subscriber board for matching the subscriber telephone and the exchange, greatly improving the reliability of the subscriber matching circuit so that on a TDX composite subscriber matching circuit -1B subscriber board, The present invention relates to a TDX-1B subscriber board, shall be composed by replacing the Subscriber Interface Circuit (SLIC) to the hybrid (hybrid) element so that a change in the existing printed circuit board (PCB), said hybrid (hybrid), the lightning and ground with strong transformer (transfomer), this transformer (transformer) and for mounting the hybrid function of matching the two-wire circuit of the four-wire circuit and a transformer of a combo (cOMBO) mounted on a conventional board, and detect the hook-on / off configuring the hook-on / off (on hook / off) and a hook ring trip detection circuit (ring trip) to block the driving of the ring by turns on is characterized in that a modular.