NUMBER CONFIRMING SYSTEM FOR ORIGINATING TELEPHONE TERMINAL

摘要

PURPOSE:To secure a comparatively easy confirmation for the notified numbers of the originating terminal by detecting whether or not the signal indicating that the oirginating telephone terminal had the incoming under the busy state is transmitted to the originating terminal from the installed trunk. CONSTITUTION:Incoming telephone terminal 2 receives 7 and memorizes 8 the terminal numbers notified from the originating telephone terminal in response 6 to the call given from the originating telephone terminal. After this, 3rd telephone terminal 3 is started to dial 12 the terminal numbers, and then whether or not the signal indicating the incoming received at the originating telephone terminal under the busy state has been transmitted to the originating telephone terminal from the installed trunk is detected at signal tone monitor circuit 13. In this way, the notified numbers can be confirmed for the originating terminal in a comparatively easy way without giving any contrivance to the telephone network and with no charging applied to the originating terminal in conversion.