| 摘要 |
<p>PURPOSE:To notify an opposite party that a response can not be immediately made to transmission from the opposite party. CONSTITUTION:When a transmission key K2 is pushed, a reception state is shifted to a transmission state, the transmission of confirmation signals are performed and the transmission state and the reception state are alternately switched in a short time for three seconds after two seconds from the transmission. When response impossible signals are received in the reception period, reporting signals are outputted from a reporting signal generation part 20, amplified and outputted from a speaker 8 as sound. Thus, it is recognized that the opposite party can not immediately make the response. In the meantime, when a mode key K1 is operated and the confirmation signals are received while a response impossible mode is set, standby is performed for two seconds from the time and thereafter, the reception state is shifted to the transmission state. The transmission state continues for three seconds and the response impossible signals are transmitted during the time. Thus, the opposite party recognizes that a present party can not immediately make the response.</p> |
