| 摘要 |
An exchange system comprises a main device including a plurality of interface sections each containing one of an extension terminal, an office line, and a private line, and a plurality of exchange control systems. The exchange system also comprises a control data management device connected to the main device and including a data storage section for storing a number of control data items, wherein each of the plurality of exchange control systems includes an exchange section for arbitrarily exchanging connections of the interface sections, and a first request section for requesting a control data item necessary for an exchange service to be provided, from the control data management device. The control data management device includes a requested data output section for reading the control data item requested by the first request section and for outputting the control data item to the main device. Each of the plurality of exchange control systems includes an exchange control section for controlling each of the exchange section and the plurality of interface sections, based on the control data item outputted from the requested data output section, where any of the exchange control systems is defined as an active system.
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