... the user can be pre-recorded 10 seconds alarm voice alarm voice broadcast.2, the host can set ... 3, host on-site monitoring, intercom functions: Alarm may duplex intercom for field personnel.4, 16 ... zone, internal zone, 24-hour zone, sound alarm, silent alarm types for different occasions.5, cable zone ( ... a telephone number users.11, host a group message can be pre-set alarm center telephone, a group ...