a cross - connecting module includes a demultiplexing unit , a first replacing unit , a cross - connecting unit , a second replacing unit , and a multiplexing unit . the demultiplexing unit sequentially byte - interleave - demultiplexes multiplexed transmission data into a plurality of demultiplexed data . the first replacing unit replaces pointer information indicating a leading address of a data storage area of each of the second and subsequent demultiplexed data , which are byte - interleave - demultiplexed by the demultiplexing means , with pointer information indicating a leading address of a data storage area of the first demultiplexed data . the cross - connecting unit cross - connects the first demultiplexed data from the demultiplexing unit with the second and subsequent demultiplexed data from the first replacing unit . the second replacing unit replaces the pointer information of each of the second and subsequent demultiplexed data from the cross - connecting unit with a preset specific value . the multiplexing unit byte - interleave - multiplexes the first demultiplexed data from the cross - connecting unit with the second and subsequent demultiplexed data from the second replacing unit .