| 摘要 |
A plurality of personal computers 12 and a first printer 20 is connected to the LAN circuit 10. A plurality of printers 20a-20x is connected to the first printer 20 in a series. If it is possible, the printer 20 prints received printing data. However, if it is not possible, the printing data is transmitted to the second printer 20a. Therefore, if at least one of the printers 20-20x is in the available condition for printing, the printing data can be printed. That is, even if the printer 20 cannot perform the printing operation, overall printing work will not be backed up.
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