| 摘要 |
PURPOSE:To eliminate an accident that a radio line cannot be connected for the collection of outgoing and incoming calls by detecting the idle channel in accordance with a channel number to start from the initial value inherent to a parent device. CONSTITUTION:A free run counter 41 generates an initial value D, and a channel interval counter 42 generates a numeric (n) to cyclicly change like 1, 2, 3...8, 1, 2, and 3. A control circuit 12 starts from the initial value D, an output value (n) of a channel interval counter 42 is added to this and thus, a channel number N for the idle channel detection is prepared. Thus, in order to detect an idle channel in accordance with the channel number N to start from the initial value D inherent to a parent device 1, when plural pairs of radio telephone equipment 2 are arranged adjoiningly, the idle channel detected by respective pieces of radio telephone equipment is dispersed. Thus, even when the outgoing and incoming calls are collected, the accident that the radio line cannot be connected can be eliminated. |
