PURPOSE: To simplify the dialing operation by employing a card able to register plural sets of abbreviation registration number and dial number pairs for the telephone set and reading a dial number corresponding to an entered abbreviation registration number to make dialing.
CONSTITUTION: An additional function section 12 is added to an existing telephone set section 11. The additional function section 12 is provided with a telephone set control section 13 controlling a telephone set and a display section 14, an operation section 15 and a card loading section 16 in addition to the existing telephone set section 11 are connected to the telephone set control section 13. Then a dial number stored on a card loaded from the card loading port is read corresponding to the entered abbreviation registration number and the read dial number is dialed. Thus, a desired connection destination is selected among plural connection destinations and dialed automatically.