The intercom can receive the other party's speech but cannot launch?

If there is a problem with the intercom, first check whether the battery is electric and the battery is okay, it may be the following reasons:

1. The emission key (PTT key) is aging or damaged outside the rubber;

2. Poor contact with the microphone sockets;

3. Software circuit plugs are not in touch with the motherboard socket;

4. Dialogue (Mi Tou) failure;