| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system and a communication control device reducing communication cost and securing reliability by setting a plurality of low speed circuits in communications between remote place computers into normal circuits and standby circuits, and further assigning the normal circuits to data and error correcting codes and using number of stand-by circuits corresponding to the amount of the transfer data. SOLUTION: The communication circuits connecting the communication control device 20A and the communication control device 20B consists of normal circuits comprising one or more circuits which transfer data and one or more circuits which transfer the error correction codes, and standby circuits comprising one or more standby circuits which are used connected in response to the amount of data transfer. The communication control device 20A monitors storage amount of transmitted data stored in a transmission buffer 41 which holds the transmitted data for a while, and if the transmitted data storage amount exceeds a specified increase value, one or more standby circuits are connected, and if the transmitted storage amount decreases to below a specified decrease value, one or more standby circuits are cut off.
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