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Emergency telephone and radio dispatching system for comprehensive pipeline corridor

2023-01-08 14:10:54

I. System industry overview  

Urban integrated pipeline corridor is a public pipeline corridor used for centralized laying of municipal pipelines such as electric power, communication, radio and television, water supply, drainage, heat and gas under the city, which is a modernized, scientific and intensive urban infrastructure. The construction of urban underground integrated pipeline corridor can effectively solve the problems of repeated excavation of road surface, dense overhead line network, frequent pipeline accidents, etc. It is conducive to ensuring urban safety, improving urban functions, beautifying urban landscape, promoting urban intensive and efficient and transformational development, improving the comprehensive bearing capacity of cities and urbanization development quality, increasing effective investment in public products, pulling social capital investment, and creating a new impetus for economic development. New momentum of development. Corridor road as an underground project, while the corridor due to the operation of a variety of electric power, water conservancy and communication equipment pipelines, making the corridor has an extremely complex electromagnetic environment inside, these two conditions make it difficult for cell phone signals to enter the corridor, therefore, the emergency phone in the corridor has become the only tool to communicate with the outside world, which determines that the emergency phone in the corridor can not be equivalent to other industry phone. It is made as a kind of communication guarantee system to provide real-time, stable and full-coverage communication demand for the staff in the pipe corridor, to guarantee the safety of life and property of personnel and ensure the safe and stable operation of the pipe corridor project. At the same time, many corridor units have their own communication needs, which makes the emergency phone must have the communication ability to call each other with the outside world, and must be compatible with the call needs of each corridor unit.  It adopts the leading network audio technology, and the communication extension nodes in the corridor adopt the network for communication signal transmission, which is a pure digital transmission intercom broadcasting system. It solves the problems of transmission distance limitation, multi-level management, easy interference, poor stability, unclear voice effect, echo, noise, arrogance, etc. that exist in traditional intercom broadcasting system.

System structure is stable, flexible networking, only need to connect the equipment to the internal network can constitute a powerful digital communication system, can realize the integration of computer network, emergency help, background music, video monitoring, public broadcasting applications, can also be extended to the public telephone network, video conferencing systems and other applications. The solution integrates the intercom phone system, broadcasting system and alarm system, and the operation of the above functions can be easily realized through the self-developed control software, which simplifies the workload of management personnel and provides stable and reliable guarantee for the communication needs in the corridor.

III. System design principles

u Reliability  

Ensure the system works uninterruptedly during operation, with mature softswitch technology, industrial-grade design and embedded operating system to further enhance the stability of the system;

u Advanced  

This system is developed after years of research and development, and the actual experience of many projects, combined with the valuable opinions of owners and design institutes, we continue to improve, through the accumulation of years of experience to improve, and now there are successful cases throughout the country;

u Compatibility  

We use the SIP protocol softswitch system, is a set of developed systems, later other manufacturers as long as the international mainstream is designed in accordance with the SIP protocol, you can join our system, compatibility is very strong, so that the user has no worries;;


We design, taking into account other business needs in the later stage in the pipe corridor channel, and reserve functional interfaces for video monitoring, smoke detection, fire alarm, event detection, etc., to provide users with cost-effective access to later services;

 Four system design description

According to the actual situation of the pipe corridor, overcome the shortcomings of the previous system, inherit the advantages of each system, and combine with the current technical development and management requirements, we design a set of professional integrated pipe corridor emergency telephone and broadcasting dispatching system, the overall network structure of the system is simple and reliable, and the nodes are connected by optical fiber to form a ring network, while the broadcasting speaker signal and emergency telephone signal are transmitted through the optical front. This makes the system simpler and more efficient than traditional solutions in terms of equipment deployment and line laying, and has a real-time fault display alarm function, which greatly simplifies the workload of operation and management personnel, comprehensively protects the lives and properties of staff in the corridor, and strongly supports the daily work of management staff.  

The system design has the following main parts:

1 、Monitoring Center

Set up a set of intercom broadcasting management master controller equipment in the monitoring center to realize the registration configuration, number assignment, exchange processing, routing relay, authority management, storage recording, query management functions of all intercom telephone equipment and broadcasting equipment in the whole section of the corridor; the master controller has the unified scheduling and management of the intercom broadcasting system, realizing the partition management, terminal status, scheduling operation, queueing, music management, broadcasting management, meeting management of the front-end equipment, Music management, broadcast management, conference management, address book management, SMS management, etc. It has common scheduling functions such as intercom, shouting, demolition, insertion, monitoring, etc. The intercom broadcasting phone can work independently of the management console to initiate intercom and broadcasting functions; install telephone access gateway equipment to realize mutual communication between internal intercom broadcasting system and external telephone. To ensure the communication between the inner and outer parts of the corridor.

2、Inside the corridor

Emergency telephone deployment: emergency telephone boxes are set up at certain intervals in the corridor, so that the corridor has the ability to make emergency calls throughout the corridor, taking into account that each application cabin in the corridor transmits various signals and materials, so all emergency telephone equipment in the corridor should have industrial-grade waterproof, dustproof, corrosion-resistant and anti-oxidation capabilities, and at the same time, the emergency telephone deployed in the gas cabin has an explosion-proof function.  

Due to the complexity of the internal environment of the corridor, it is difficult to receive cell phone signals stably, so the emergency telephone system, as the main communication method in the corridor, must have a high degree of stability and redundancy characteristics. For this reason, when we designed the plan, we adopted a ring network for all emergency telephone equipment nodes in the corridor, providing explosion-proof equipment for the gas compartment and high-grade waterproof and anti-corrosion emergency telephone equipment for the sewage and city water compartments, and making different equipment selections according to different compartment environments to ensure the stable operation of the whole system. At the same time, the ring networking method can guarantee the availability of emergency phones in each application cabin to the greatest extent, and when the network of a single equipment node is abnormal, it does not affect the normal communication and use of other nodes.  

Broadcasting system: The waterproof speaker is used as the speaker of the broadcasting system, and a speaker is installed in the corridor at a certain interval to ensure that the sound effect can be covered throughout the corridor, and the waterproof speaker is connected to the emergency telephone box, and the network broadcasting signal is provided through the emergency telephone box. The broadcasting system provided by us has intelligent hibernation and wake-up function, which detects the broadcasting signal from the control host of the monitoring center in real time, and when there is no signal input, the broadcasting system automatically enters the hibernation state.                     

When there is no signal input, the broadcasting system automatically enters the hibernation state, and when there is signal input, the broadcasting system automatically starts and broadcasts the sound, the intelligent automatic hibernation and wake-up function greatly reduces the time of equipment power on standby and greatly extends the actual service life. It can provide several times more real use time for the pipe corridor channel than the conventional brand broadcasting.

 V. Main functions of the system

1、Scheduling management

Management module:

Intercom management, broadcast shouting, broadcast music, alarm management, call management, video linkage.  

Partition management:

Multiple management partitions can be set according to the regional distribution or business structure, automatically generate partition broadcast numbers, broadcast shouting or play music for this partition, and set partition independent management.  

Terminal management: can visually display the intercom or broadcast management terminal status of each partition, can display the number, name, work, with whom to talk and other status.  

Queuing management: can display incoming call information, sequential queuing display, retain 20 recent communication records.

Scheduling functions: call intercom, call hang-up, insert call, call split, broadcast shouting, text broadcast, live monitoring.

2、Emergency phone call

Wired intercom: pipe corridor intercom, one key call, hands-free intercom, directional pickup, intercom priority over music broadcast, intercom, broadcast, music integration, support alarm access.

Wireless intercom: realize wireless intercom based on WIFI and other networks  

Mobile intercom: realize wireless intercom based on WIFI, 3G/4G and other networks, which can realize internal communication and communication intercom with monitoring center.

Off-line intercom: when the network of the main controller is abnormal, the intercom and the emergency phone in the corridor can still make calls and conversations  

Call group connection: multiple numbers can be set as an answering group, unified external a total number, to achieve the simultaneous processing of multiple people.


3、Radio shouting

Single shouting: can shout remotely to any one front-end emergency phone or broadcasting equipment.

Partition shouting: remote shouting can be made to any partitioned emergency telephone or broadcasting equipment at the front end.

Full line shouting: can make remote shouting to any emergency telephone or broadcasting equipment at the front end.

Text broadcast: Remote text broadcast shouting can be made to any emergency telephone or broadcasting equipment at the front end.

Pull broadcast: The phone, wireless handheld can broadcast shout to any emergency phone or broadcasting equipment.

Trigger broadcast: The phone and wireless handheld can make trigger broadcast to any emergency phone or broadcasting equipment.

4、Radio shouting

Music files: upload and manage the audio files needed to be played.

Format conversion: Upload audio files are automatically converted to a unified audio format.

Playlist: Different styles of playlist can be set according to the type and need.

Manual Broadcast: You can manually start and stop the set playback tasks.

Timed broadcasting: You can set fully automatic timed broadcasting tasks for 7*24 hours.

Trigger broadcasting: Playback tasks can be executed by pulling and alarming trigger signals.

Volume independent: the equipment broadcast volume is independent of the intercom volume, more suitable for the needs of the scene.

Music recovery: the intercom terminal automatically resumes broadcasting music playback after the intercom call ends.

5、Alarm management

Alarm alert: emergency phone box with a key alarm function, received an alarm pop-up window processing reminders, alarm sound reminders.

Alarm video: emergency phone box with a key alarm function, received an alarm automatically associated with the switch to display the video monitoring image of the event site.

Alarm processing: you can manually register the cause of the alarm, or select the common cause of alarm registration.

Alarm records: alarm management records are automatically generated after the alarm is processed, which can be easily viewed later.

Alarm monitoring: automatically open real-time monitoring of the scene after receiving the alarm and recording.

Report output: statistical analysis of the occurrence of alarm records, generate reports or print.

6、Call recording

Record query: query all the call records by calling number, called number, call time and call type.

Recording query: Query all the call recordings, which can be queried by calling number, called number, call time and call type.

7、Video linkage

Intercom linkage: automatically linkage to display the corresponding 2 video surveillance images when intercom calls are made.

Help linkage: automatically linkage display the corresponding 2 video surveillance images when help call.

Alarm linkage: automatically linkage to display the corresponding 2 video surveillance images when an alarm is received.

Event detection linkage: automatically linkage to display the corresponding 2 video surveillance images when a warning is received.

Six, the main advantages of the system

1、Off-line intercom function

When the trunk fiber in the corridor is interrupted, the connection with the main controller of the management center is not available, and the emergency phone is offline. The unique offline function can guarantee the communication between the emergency phone node and the central intercom, and the manual call will not be affected, so as to provide the maximum degree of communication guarantee between the staff in the corridor and the management center.

2、Multi-level management structure

The unique flexible authority control function of our system can set authority according to different accounts, which flexibly meets the management and dispatching needs of staff at all levels of the integrated pipe corridor management center and meets the requirements of the integrated pipe corridor management center that the internal situation of the pipe corridor can be monitored and controlled.

3、Integrated scheduling management

The system integrates intercom call, broadcast shouting, background music and dispatching operation as the main functions, and extends various practical functions such as early warning broadcast, alarm management, meeting management, call management, video linkage, event detection, short message, address book and other highway current functions, adopts professional intercom broadcast dispatching management software, and adopts automatic, intelligent and humanized operation design, which greatly improves the efficiency of the integrated pipe corridor The work efficiency of the center's management personnel is greatly improved, and the automatic processing of problem discovery, problem disposal, problem recording and event detection alarms is realized.

4、Intelligent event detection function

Event detection and analysis software is our application software with exclusive patented technology, through accurate data collection technology and core algorithm, the moving screen data of different application scenes are statistically summarized and user reports are formed according to industry requirements. The data team aims to find data indicators with core value for users from data analysis conversion and analyze and present them, and to automatically alert the data parameters that are out of the range of conditions.  

Our event detection and analysis software has been widely used in industries such as scenic spots, plazas, stations, airports and commercial centers, providing users with a basis for data analysis-based decision making with our core algorithm technology.  

Due to the complex electromagnetic environment and uncertain air oxygen content inside the corridor, the corridor will be unoccupied during most of the working hours, therefore, the operating status of systems, pipes and equipment in each corridor application chamber urgently needs intelligent solutions for detection and early warning. The event detection and analysis software provided by us is able to set flexible conditions and analyze and convert the index parameters of interest in different application compartments into data that we can collect and detect. For example, smoke warning, when smoke appears in the corridor, the system, through analysis and judgment when smoke data is detected, automatically reminds the interface and plays a sound warning in the console for timely handling. Other application warnings include abnormal conditions such as pedestrian walking, pipeline liquid overflow, gas injection, and pipe chamber explosion. Through timely and efficient data analysis and early warning, the damage caused by unexpected events in the pipe corridor channel is minimized, and the stable operation of system equipment in the integrated pipe corridor is fully guaranteed.

5、Signal transmission advantage

The equipment nodes of this program adopt HN series industrial switches developed and manufactured by us for signal transmission, which are highly stable after years of project verification and version update, and can still operate normally and stably in harsh industrial environment. The HN series of industrial switches are equipped with ring-type networking function, which perfectly supports the emergency telephone solution networking in highway, tunnel, pipe corridor and other scenarios, ensuring the best single point of failure resistance of the whole solution and system redundancy. Advantageous features are as follows:

Model coverage provides 100Gigabit/Gigabit optical port and 100Gigabit/Gigabit electrical port

Supports Command Line Interface (CLI) for quick and easy configuration of major management functions, self-healing ring protocol (self-healing time <20ms), STP, RSTP and MSTP Ethernet redundancy

IGMP Snooping and GMRP filtering for multicast traffic

Support port-based VLAN, IEEE 802.1Q VLAN and GVRP protocol, easy network planning, port mirroring

Supports Ethernet/IP and Modbus/TCP protocols for device management and control

Bandwidth management: support for port aggregation, port speed limiting, and broadcast storm suppression

Support QoS and ToS/DiffServ for traffic control and management

Support link aggregation to optimize bandwidth utilization

Support SNMPv3, IEEE 802.1X, HTTPS and SSH to enhance network security

Use RMON to effectively enhance network monitoring and prediction capabilities

Support bandwidth management to ensure network stability

Support MAC address-based port locking to prevent illegal intrusion

Realize automatic alarm through E-mail and relay output

6、System high availability

The emergency telephone and broadcast signals of this program are transmitted by IP digital signals, abandoning the traditional program-controlled telephone that requires laying a large number of analog telephone lines and the risk of failure that is difficult to troubleshoot, and the transmission medium is transmitted by a dedicated fiber optic network, making the overall system have high transmission speed and high stability, with great room for expansion for subsequent system expansion. All emergency telephone nodes in the corridor are connected in series with fiber optic network, and emergency telephone equipment nodes are connected in turn, forming a ring-shaped self-healing network structure as a whole, even if a single point of failure still does not affect the operation and use of other nodes. It greatly guarantees the communication ability inside the corridor.

7、Core value

  The system solution we provide is to enhance the value for the user as the core pursuit, for the staff inside the corridor: the system can play background music and environmental optimization, abnormal situation of the radio playback guidance and guidance. The system is equipped with the function of extending support for external telephone lines (calling local and internal part of the enterprise), which flexibly meets the communication business needs of the management center of the pipeline corridor. Moreover, the system has event detection function to guarantee the timely and efficient alarm and processing process, and fully protect the life and property of the traveling personnel. For the maintenance personnel of the system, the design of our solution can achieve:

Simplify the number of equipment

Simplification of line laying

Intelligent fault display

Easy maintenance  

As the manager of the pipeline corridor, the system is able to carry out multi-level monitoring, unified management and scheduling, in line with the current development trend of staff reduction and efficiency, thus realizing the development value of reducing operation and management costs.