| 摘要 |
The wireless radio calls the opposite party selectively to ensure the security in the wireless communication. The device includes a DTMF detector(18) for reporting the situation to CPU(15) when the detected DTMF signal is coincident with their value; a DTMF generator(19) for generating and transmitting the DTMF signal to the modulator(13); a DTMF selector(17) for setting the DTMF signal to CPU(15); ringer generator(20) for generating tone when it is called; and call selection switch for selecting either single call or group call.
|
