| 摘要 |
A communication system includes a CPU for controlling internal operations; a management table storage portion for storing a management table referred to for communication control; an intrinsic identification number setting portion for setting a number for identifying respective communication devices; a network interface connected to a network connecting the communication devices and controlled by the CPU; and at least one interface having a hall transmission line interface connected to the hall transmission line, a respective cabin controller interface connected to a corresponding cabin controller, a group management controller interface connected to the group management controller, and a transmission line expansion interface connected to an expansion transmission line, other than the hall transmission line, wherein the interface is controlled by the CPU.
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