| 摘要 |
A data communication apparatus and a storage medium storing therein a program enable error connection of cable to be detected in the case where a plurality of low speed SHELVes are connected to a high speed SHELF through cables respectively. A collation code from a low speed SHELF to be a second communication device is received by a high speed SHELF to be a first communication device, before judging whether it is the collation code from an interface unit 102 or it is the collation code from an interface 103. When the collation code is outputted from the interface 103, it is judged of the error connection of the cable. Further a collation code from a high speed SHELF is received by the low speed SHELF, when established SHELF number does not agree with the collation code, it is judged as the error connection of the cable.
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