| 摘要 |
PURPOSE:To attain the automatic outgoing of a trunk line and to save time and labor only by setting the trunk line at absence by installing an absence transfer destination memory device storing information on the absence trunk line destination of an extension and line wire. CONSTITUTION:When a telephone set 1 is off-hooked to dial the extension number of the telephone set of an opposite party, which is set to the absence trunk line transfer, a terminal controller 2 detects the dialing and transmits it to a central control unit 5. It judges the dialed number, decides the telephone set of the opposite party and judges whether or not the telephone set is set to the absence transfer of the line wire or extension. When the telephone set is set to the absence transfer of the line wire, the central control unit 5 searches the telephone number of the transfer destination of the line wire from the absence transfer destination memory device 6, controls a trunk line control unit 4 to grasp the trunk line, and transmits the dialing. |
