First, alert system system overview:
A set of alert system consists of a host, 1 to 6 (can be increased according to customer requirements) station extension, optical transceiver, camera.
A host can manage six or more extensions at the same time. According to the principle of the upward call priority, any extension calls the host. Any operation of the host is based on the first call received. If the corresponding call is not processed in time, the extension The indicator lights up as a reminder.
At the same time, the host has absolute control over the extension. In any case, it can immediately call the extension and start the video/audio part of the extension. It can monitor and monitor the situation on the spot, and can also amplify the propaganda.
Second, characteristics
•  All-fiber structure, all-digital transmission • Completely overcome electromagnetic interference, high reliability •  Long-distance transmission, up to 25KM or more •  High reliability, scalability, add a host, can be Six extensions added: 简化 Simplified structural network, centralized management, and reduced maintenance costs  Simple configuration, suitable for small systems with few monitoring points
Third, function description
1, the terminal calls the host (see alert call, host answers)
If citizens or tourists need assistance, after finding the alert, press the emergency call button, the alert LED lights on the panel, and open the video at the same time, the duty room can quickly see the scene, to facilitate the emergency treatment as soon as possible, All the switch signals are sent to the host upwards. After the host receives the switch, the corresponding LED flashes and the buzzer emits a dripping sound. The host presses the corresponding button to answer, the light stays on, and the buzzer stops. If you answer the call, other terminals are also calling. The corresponding LED flashes to indicate that a new call is coming in.
2. The host calls the terminal (see the host call alert)
In order to regularly or randomly sample the police near the public security situation, or the terminal calls and the host unattended when calling back, or encounter an emergency, just press the button corresponding to this road, the host can immediately connect the police through the scene, The sound and video are delivered to the center immediately.
3. The missed call host is displayed unattended for a long time, and the terminal calls the host. The corresponding LED light is always on. If it is not displayed, the staff can call back to observe and monitor the situation on the spot.
4, control the terminal hangs up (see the host call alert)
The host computer can control the startup and shutdown of the terminal. After the public calls through the alert, the user leaves without hanging up. Our default setting is to automatically cut off in 7 minutes, or the host calls back, and then the host hangs up and the terminal hangs up.
IV. Application The phone is suitable for all kinds of tourist attractions, such as zoos, country parks, forest parks, highways, subways, banks, oil depots, airport station terminals, power plants and substations, sanatoriums, city squares, etc., unattended or Greater mobility of people and areas