PURPOSE: To attain high speed transmission with lots of quantity by inhibiting an output of the content of a relevant packet when it is discriminated that an output of a digital filter exceeds a predetermined value.

CONSTITUTION: The receiver is provided with a reception circuit 2 receiving a packet (1) on a transmission line, at least one pulse generating circuit 5 generating a pulse in response to the received packet, a digital filter 6 connecting to each pulse generating circuit 5 and a comparator circuit 7 comparing an output signal of the digital filter 6 with a predetermined value (4). Then when it is discriminated that the output of the digital filter 6 exceeds a predetermined value by the comparator circuit 7, the reception disabled state is reached and the reception circuit 2 aborts the packet inputted at the reception disable state and the packet inputted at the reception enable state is outputted immediately via a terminal 3. Thus, packet transmission with lots of packets and high speed is attained.