| 摘要 |
PURPOSE:To visualize the call time, by providing a call time display part, which is interlocked with the talking circuit and is operated to start the time display by closing of the talking circuit and extinguishes the display by depression of the hook switch, in the telephone set. CONSTITUTION:Round or linear call time display equipment 4 is arranged in the front of telephone set main body 1 and is interlocked with the talking circuit, and time display 5 of display equipment 4 is started when the talking circuit is closed. Display 5 is stopped as it is when the talking circuit is opened, and display 5 is extinguished when the call terminates and handset 2 is hooked on the base and hook switch button 3 is depressed. Thus, the call time is visualized during the call with a simple constitution. |
