| 摘要 |
A media gateway device includes a first specific call control unit performing line connection control of one of plural interconnection units and plural second call control units requesting the first specific call control unit to perform the line connection control of one of the plural interconnection units. The first specific call control unit has a management data storage unit storing management data for determining which one of the plural interconnection units controls which line of the public network. Each of the plural second call control units has a control request unit requesting the first specific call control unit to perform line connection control of one of the plural interconnection units.
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