High-Speed Rail IP Intercom Emergency Telephone System for Tunnel Construction: Building a Safe and Efficient Communication Guarantee for Construction

During high-speed rail tunnel construction, the enclosed

environment, high noise levels, and inherent risks make

reliable communication crucial for personnel safety and

construction progress in the event of an emergency.

Based on this need, the High-Speed Rail IP Intercom

Emergency Telephone System was developed to provide

stable, intuitive, and reliable emergency communication

and command capabilities for the construction site.

I. System Overall Architecture: Designed Specifically for

High-Speed Rail Tunnel Construction

The high-speed rail IP intercom system adopts a clearly

layered communication architecture to meet the

long-distance, multi-point, and high-reliability requirements

of the construction site.

System Components:

Terminal Equipment Configuration:

Left Tunnel Emergency Telephone

Right Tunnel Emergency Telephone

Control Room Telephone Host (Control Center)

These terminals are distributed at key locations within

the tunnel, forming a comprehensive and responsive

emergency communication network, ensuring that the

control room can be contacted immediately in case of

any incident in any area.

II. Detailed Explanation of Core Functions: Communication

+ Alarm + Command Integration

1. Two-way Intercom Communication, Simple and Efficient

Operation

As the basic function of the high-speed rail IP intercom

system, the two-way communication design fully considers

the usage habits of construction personnel:

Tunnel to Control Room Calling

Simply lift the handset to automatically dial out, no dialing

required; the control room can answer with a single button

press.

Tunnel Terminal to Tunnel Terminal Calling

Supports one-button speed dialing, facilitating work

coordination and on-site communication.

Control Room Initiated Calling

The control center can call any tunnel terminal with a single

button press, enabling proactive dispatching.

No complex training is required; it's ready to use immediately,

significantly lowering the barrier to entry for on-site use.

2. Emergency Alarm System, Risks Controlled Immediately

In the event of an accident or emergency, the system can

quickly enter emergency mode:

After an alarm is triggered in the tunnel, the control room

host receives the alarm signal in real time.

The host screen clearly displays the alarm source

(Left Tunnel / Right Tunnel).

Automatic voice broadcast of warning instructions,

such as:

"Please evacuate the construction area immediately."

This function eliminates the need for manual judgment

by control room personnel, significantly shortening

response time and serving as a crucial safety guarantee

for high-speed rail tunnel construction. 

3. Broadcast and Command Function: Unified Dispatch

for Greater Efficiency

The high-speed rail IP intercom system not only allows

for "communication" but also for "command":

The control room can initiate group calls and broadcasts

to all terminals inside the tunnel.

Supports directional broadcasting to the left/right tunnel.

Suitable for construction phases such as blasting, power

outages, and equipment entry/exit.

Typical broadcast command example:

"Blasting operations are about to begin ahead; please

evacuate immediately."

Unified commands and clear communication prevent

safety hazards caused by information asymmetry.

III. Technical Characteristics: Adapting to Complex

Tunnel Environments

Flexible Networking Methods

The system adopts a mature and stable communication

architecture:

Telephone → Switch → Wireless Bridge → Router

Supports different tunnel lengths of 2KM / 3KM / 5KM

Can be flexibly deployed according to the construction

phase of the high-speed rail tunnel.

Stable network, strong anti-interference ability

Independent operation, easier maintenance

Compared with traditional communication solutions,

the high-speed rail IP intercom system has significant

advantages:

No PBX server required

Does not rely on external communication systems

Independent local operation, stable and reliable

Intuitive operation interface, low maintenance cost

Even in remote mountainous areas or construction

sites with limited network conditions, it can operate

stably for a long time.

IV. Why is an IP Intercom System More Necessary

for High-Speed Rail Tunnel Construction?

With the continuous improvement of high-speed

rail construction standards, construction safety and

refined management have become essential

requirements.

The high-speed rail IP intercom emergency telephone

system integrates communication, alarm, and

broadcasting functions, solving not only the problem

of "whether communication is possible" but also the

problem of "how to command quickly."

Applicable Scenarios

High-speed rail tunnel construction

Railway renovation and expansion projects

Long tunnel construction sites

Enclosed underground engineering