| 摘要 |
PURPOSE:To connect a circuit smoothly by storing corresponding relation between plural terminal equipments and plural transmission circuits. CONSTITUTION:A terminal control part 11 receives data from terminal equipments T1-T4, transfers the received data to transmission control parts 12, 13 and assigns data from the transmission control part 12, 13 to the terminal equipments T1-T4 in accordance with addresses. When transfer and assignment are executed, the terminal control part 11 refers a storage part 14 in a rotation/one terminal corresponding table. The storage part 14 has areas 141-144. The number ''1'' in the area 141 indicates that the terminal equipment T1 is connected to a transmission circuit 16. Each terminal equipment is provided with a switch turning the transmission circuit. At the starting of the terminal equipments, a code indicated by the switch is transferred to the storage part 14. If a power supply for the terminal equipments is disconnected to turn the switch and then the power supply is connected again, the connection of the circuit can be switched. |
