MULTI-FREQUENCY SIGNAL TONE CONTROL SYSTEM

摘要

PURPOSE:To prevent an unnecessary multi-frequency signal from being recorded, by using a control function and information transmitting/receiving function of a terminal and controlling the transmission/interruption of the multi-frequency signal at an exchange. CONSTITUTION:In using the service storing the sound during communication, the service storing the sound is requested from a terminal control circuit 5 of the 1st terminal 1 to an exchange control circuit 8 of the 1st telephone exchange 2 via a control information line 11 is requested. Then, the exchange control circuit 8 transmits a command storing the information of sound circuits 13, 14 to a sound storage device 4 through the control information line 15 and transmits a command the interruption of the multi-frequency signal to the terminal control circuit 5 of the 1st terminal 1 via a control information line 12.