PURPOSE: To improve reliability by providing respective means for detecting, recording controlling and display controlling the error of the dialed called party number and informing the case of the error of the number of the called party and deleting or changing of the error.

CONSTITUTION: Dial data are inputted by an operation part 1 and dialing is started through a display control part 19 and a main control part 6 at a communication control part 10. A detection part 17 inside the communication control part 10 detects that the called party number is the error from a signal transmitted by hooking a receiver on at the called party side immediately after hook-off. The detection part 17 informs the error of the called party number through the main control part 6 of a recording control part 18 and the display control part 19 and the recording control part 18 makes a recording part 14 record and output the error of the called party number. Also, the display control part 19 makes the recording part 14 display the error of the called party number and the automatic deletion or the change of the error. Thus, the error for the second time and untransmission are prevented and the reliability can be improved.