A search engine selects initial coefficients for a receive equalizer. The table has a head rest, arm rests and two cushions that are shaped similar to the human body. It is the subject of the present invention to decrease the relationship between the data processing and the pattern of the consumption current. The multiplexed signal light amplified in the Bi type EDF is outputted from an output end by way of an optical coupler, an optical isolator, and an optical coupler. The shield can includes a ground structure formed at the connector engaging portion area to enclose the connector and electrically couple the ground structure with the ground portion of the connector.