Functions of emergency telephone broadcasting system in highway tunnels

1. Expand the broadcast function, and control the tunnel broadcast without adding optical fiber (sharing one optical fiber with the emergency phone), including single call, zone call, full call, and volume adjustment functions. And at least two audio sources can be played simultaneously.

2. It can be linked with the tunnel monitoring screen of the monitoring sub-center.

3. The remote phone automatically commands the broadcast, sets the telephone access port, and when the incoming call needs to be broadcast, press the telephone access key to realize the remote phone amplification broadcast, such as the chief's phone, fire alarm phone, etc.

4. The broadcast amplifier is set with over-voltage and under-voltage protection. After the device is turned on, it should automatically monitor the voltage. If the battery is out of power or the voltage is insufficient, the computer in the monitoring center will immediately alarm.

5. The central broadcast console can call the tunnel amplifier individually, in zones, or all amplifiers.

6. The central broadcast console can select and shut down the tunnel amplifier. When the broadcast system is turned off, the tunnel extension is turned into a power-off state to reduce power consumption and increase service life.

7. The wired broadcasting system and the emergency telephone system can work independently. When the control center calls the broadcast, it can also call the emergency telephone at the same time, and the emergency telephone can be used to monitor the broadcast effect.

8. The control center can detect the working status of the tunnel amplifier.

9. The broadcasting system is linked with the monitoring system. In case of emergencies such as fire, the set broadcast recording can be automatically broadcast to the scene.

10. The control equipment and transmission optical cable of the monitoring sub-center are used together with the emergency telephone sub-system, which can perform full broadcast, multicast and selective broadcast, and can play at least multiple audio sources at the same time.

11. It can be linked with the tunnel monitoring screen of the monitoring sub-center.

12. It has a monitoring function. Press the load area monitoring key to monitor the broadcast content of the load area and have a digital recording function.

13. Load monitoring can remotely and automatically detect each terminal load. If a fault occurs, it will alarm the host and display it in the monitoring sub-center.

14. Networking function, the system is equipped with a LAN interface to connect to the monitoring computer network and transmit system status such as speaker on/off and fault information to the monitoring computer.

15. Automatic voice warning function, start the automatic voice system to perform uninterrupted repeated voice broadcasting.

16. When a broadcast power amplifier fails, it can immediately report its failure to the control center for the maintenance of the broadcast system.

17. The power of the broadcast power amplifier can be customized according to the bidding requirements, and the maximum cannot exceed 500W.

18. The broadcast power amplifier adopts a constant voltage type, which can ensure a sufficiently long communication distance and distortion-free sound quality.

19. The broadcast power amplifier and tunnel speaker have IP65 protection function.