PURPOSE: To obtain a telephone connecting system calling a sender subscriber by storing a sender subscriber number to an exchange or a subscriber memory of a telephone exchange network and only dialing a specific number.

CONSTITUTION: A subscriber number of a sender telephone set 1 is written on a position of an incoming telephone set 2 of a subscriber memory 7 provided in correspondence to a subscriber. At the end of talking, in calling back the telephone set 1 from the telephone set 2 conversely, a specific number, e.g., one digit is dialed. When an exchange controller 5 receives it and knows that it is an automatic dial connection, the incoming telephone set from the subscriber number written in the subscriber memory 7 corresponding to the telephone ser 2 knows that the telephone set is the telephone set 1, a channel is formed between both to attain the talking. It is effective when the incoming telephone set responds to the write time of the sender subscriber number to the subscriber memory and it is better to store plural numbers.