| 摘要 |
PURPOSE:To recognize a call at a visiting location by storing allocated position information of an extension encountered with no reply and a called extension in a storage device and displaying the no reply of the extension on all multi- function telephone sets with display device. CONSTITUTION:It is supposed that an operator X of an extension STA1 dials a number of an extension STA2. If the extension STA2 give no reply for a prescribed time, the operator X hooks off and dials a special number, then an outgoing trunk ORT connected through a route 1 sends the number of the extension TA2 received already to a central controller CC in the route 2. The controller CC converts the number of the extension STA2 and the number of the STA1 sent from the register trunk OTR into allocated position information and stores the information in a storage device MEM. No reply of the extension STA2 is displayed for a prescribed time on all extensions STA2-STAn with display connected to an electronic private branch of automatic exchange EPBX at the same time. |
