| 摘要 |
PURPOSE:To prevent trouble to surrounding persons and overhearing by varying an automatic stop time of a notice tone in interlocking with a switch selecting the quantity of the notice tone. CONSTITUTION:An output level of a notice tone is set to a mode setting 5 in a logic section by switches 0FF6, A7, and B8. The switches 6-8 are switches of pushbutton type or slide type and operated by a carrier of a slave set. With the switch A7 set to ON, a large sound output of the mode setting 5 is valid, a timer 9 is operated and a notice tone signal for 10sec is outputted to a speaker 13 as a large output level via an output adjustment section 11. On the other hand, with the switch B set to ON, a small sound output of the mode setting is valid, a timer 10 is operated and a notice signal for 30sec is outputted to the speaker 13 as a small output level. Thus, when the sound is large, the sound is quickly stopped automatically to prevent trouble and when the level with a small notice tone is selected, the automatic stop time is extended to prevent overhearing. |
