| 摘要 |
PURPOSE:To execute rapidly the call connection when the idle occurs at the trunk by storing simultaneously the opponent information of the call connection at the time of the trunk camp-on registration. CONSTITUTION:When the trunk transmitting operation is executed from a transmitting subscriber telephone set SUB and an idle trunk TRK does not exist, the subscriber dials the special number, executes the camp-on registration and dials the number of the opponent who desires the connection. The dialed opponent number is received by a transmitting register trunk ORT and stored into a memory device M under the control of a central control equipment CC. When the idle of a calling trunk TRK occurs, the central control equipment CC connects the idle trunk TRK and an output sender trunk OST, and transmits the opponent number accumulated from the output sender trunk OST to the memory device M. During such a time, from a signal sound trunk TNT to a transmitter telephone set SUB, the opponent number sending sound is sent.
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