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When the patrol staff arrives at the patrol point, the intercom will receive a query signal issued by the patrol registrar, and then automatically starts the registration operation. The information such as the identity code is sent to the patrol registrar, indicating that a patrol person has reached......

Press the alarm -specific key, the intercom makes a alarm sound or a scheduled alarm code to other handheld machines or base desks with the maximum voice.

When the intercom received a correct coding call, send a signal to the call party to respond to the call.

That is, the transmission frequency and receiving frequency of the intercom will be swapped, and the setting of the setting is also interchangeable. When there is a relay, one party does not use relay or relay suddenly does not work, but is a common way to use the two receiving frequencies of relay......

The strength of the noise in the receiving signal is corresponding to the strength of the signal. The stronger the signal, the weaker the noise. The maximum noise and minimum noise are divided into several files, and each gear is called first. The divided files are called lithosis. Users can choose ......

The strength of the noise in the receiving signal is corresponding to the strength of the signal. The stronger the signal, the weaker the noise. The maximum noise and minimum noise are divided into several files, and each gear is called first. The divided files are called lithosis. Users can choose ......