PURPOSE: To prevent a message from being leaked and to shorten a call time, by recording the call content of a multifunctional telephone set, recording the message, etc., and reproducing a recorded content.

CONSTITUTION: In an incoming call from an NTT central office 2 to the multifunctional telephone set 5, the incoming call is inputted from a central office interface 11 in a digital electronic exchange 1 to the multifunctional telephone set 5 via a multifunctional interface 12. When the incoming call arrives at the multifunctional telephone set 5, it also arrives at a digital recorder 51 simultaneously, and the call content of the multifunctional telephone set 5 can be recorded and reproduced. In this sample, a device in which the digital recorder is directly attached on the multifunctional telephone set is shown, however, the device can be constituted in such a way that the recorder is mounted on another channel, and recording is performed by operating a function button on the multifunctional telephone set when it is desired.