| 摘要 |
PURPOSE:To confirm plural originating subscribers when plural incoming calls come to a telephone and to confirm telephone numbers corresponding to an incoming calls if plural telephone numbers are assigned to this telephone set. CONSTITUTION:A memory 4 is provided with an incoming destination terminal register memory MR1 and a terminating telephone number register memory MR2. When an incoming call comes, a central controller 1 discriminates whether a call passing a trunk line C/O1 or C/O2 exists or not; and if it exists, answerable keys are discriminated in accordance with a prescribed precedence, and telephone sets T0-T2 having answerable keys are called. If this incoming passes the trunk line C/O1, 'C/O1' is stored in storage areas corresponding to telephone sets T0-T2 in the destination terminal register memory MR1, and '12' is stored in storage areas corresponding to telephone sets T0-T2 in the terminating telephone number register memory MR2. When answer comes, the lamp of a key '12' corresponding to this response is lit, and 'C/O1' and '12' stored in memories MR1 and MR2 are cleared, and the processing is terminated. |
