| 摘要 |
PURPOSE:To increase the transmission frequency of call signals per a unit time, by providing a counting circuit, which counts the occurence frequency of transmission signals, in each of plural transmitters. CONSTITUTION:An exchange 2 to which many telephone sets 4 are connected is connected to a call signal generating circuit 6 of a radio calling device. The call signal generating circuit 6 is connected to transmitters 10a-10n through a common line 8 and sets transmitters 10a-10n to the transmission state successively to prevent the occurrence of a blind sector due to the interference of radio waves. Transmitters have counting circuits respectively, and the occurrence frequency of transmission signals including communication information and an address signal for a desired one of receivers 12a-12n is counted; and when the count value reaches a particular value of the transmitter, transmission signals are transmitted. |
