PURPOSE: To enhance the service performance of the automatic answering telephone set, by storing the number of the calling subscriber into the memory of the automatic information guiding device when the calling subscriber has the on-hook and then informing the incoming call information stored by dialing the special number of the incoming subscriber.

CONSTITUTION: Called subscriber telephone 2 connected to incoming trunk 4 of the incoming side is called out by calling subscriber telephone 1 of the originating side and via outgoing trunk 3. And in case the called subscriber is absent with no answer given and the calling subscriber gives the on-hook to telephone 1, the identification is given through the central processor of the incoming side to the subscriber to accept the information service of the incoming call arriving during absence of the called subscriber. When receiving this service, the calling number discrimination request signsl is transmitted from trunk 4. And the connection is secured through the central processor for figure transmission trunk 7, trunks 3 and 4 plus automatic information guiding device outgoing trunk 8 each; and then the calling subscriber number is stored in data storing drum 10 within automatic information guiding device 12. Thus the incoming information is informed along with the watch information when the incoming subscriber dials the special number.