Alarm equipment, special communication language for alarm intercom call.

Special communication language for alarm intercom telephone of alarm equipment: CQ, CQ, CQ. Correct calling terms: CQ, CQ, CQ, here is BG4*** (this call sign is explained in letters at least twice). Call your friend station and wait for a response. EmergencyAlarm Press the alarm button, and the intercom will give an alarm sound at the maximum sound, or send a predetermined alarm code to other mobile phones.