| 摘要 |
PURPOSE:To make it possible to give a general command without fail when a talking circuit is idle, by allowing a common control switch-board to select a trunk with priority given to the circuit. CONSTITUTION:Talking circuits 1CH and 2CH and circuit 3CH for both talking and general commanding are provided and a trunk selection through the originating of general commanding telephone set DSP-TEL is controlled by marker MK. At the time of the selection of a specific circuit, the trunk selection is made with 1CH and 2CH given higher priority than that of 3CH. |
