| 摘要 |
PURPOSE:To connect a predetermined terminating subscriber only by pressing a calling button and to recall the calling subscriber when the terminating subscriber responds by connecting a recalling means to recall the calling subscriber at the response of the terminating subscriber. CONSTITUTION:An automatic telephone exchange accomodating a telephone set EXTA with a calling button and a terminating telephone set EXTB is provided with the recalling means to recall the calling subscriber at the response of the terminating subscriber. The calling means is provided with a service trunk 5 sending a call signal to the calling subscriber at the response of the terminating subscriber and a ringer trunk 6 sending a call signal to the terminating subscriber when the terminating subscriber's line becomes idle as the result of the supervisory of the terminating subscriber in busy. In addition, the terminating telephone set EXTB is provided with a display means displaying calling subscriber's information such as the calling subscriber's No. |
