To eliminate the labor and time for transfer of a call by utilizing the caller telephone number notice service thereby allowing opposite party desired by the caller makes a reply with priority.

When a telephone number of a caller in contract with a caller telephone number notice service through a public line 1 is informed, a control section 4 compares the number with a number stored in advance in a memory section 5. When there is any matched telephone number, the control section 4 starts calling from a telephone set 9 designated for ringing of a trunk line incoming tone with priority. Since the telephone set 9 being an opposite party desired by the caller rings at first in this way, a probability of replying a telephone set 9 of other user in a group is lower and then the desired opposite party makes the reply with higher priority.