4G Communication Intercom System Solution

Developed a 4G-based wireless communication system with solar power and cloud dispatch, supporting intercom, emergency alarm, and video, suitable for scenic areas, campuses, and industrial parks.

Project Background

With the growing demand for smart city development and outdoor emergency communication, traditional wired communication systems face significant challenges in complex terrains such as scenic areas, mining zones, and remote work sites—namely high cabling costs, difficult installation, and inconvenient maintenance.

This solution is based on a 4G wireless communication architecture, integrating solar power supply and cloud-based dispatching technologies to build a multifunctional wireless communication system. It supports voice intercom, emergency alarm, and video linkage functions, and is widely applicable in scenarios such as scenic area safety, campus security, and industrial park monitoring.

Requirements Analysis

Coverage Requirements:

Support 4G signal coverage within a radius of 5 km per base station. In areas with significant terrain variation, relay equipment is required to enhance coverage.

Functional Requirements:

One-touch emergency alarm；Group intercom communication；Dispatch and command center integration；Video linkage；Access control system integration

Environmental Adaptability:

Alarm terminal protection level: IP65 waterproof rating；Column-mounted device lightning protection: ≥20kA；Operating temperature range: -30°C to +60°C

Power Supply Requirements:

In areas where cabling is difficult, solar power shall be used. The battery must support at least one week of operation without sunlight, with a minimum capacity of 13Ah.

Scalability Requirements:

The system must support seamless expansion, allowing up to 2,000 terminals.

Design References

This solution is designed in strict accordance with current national standards, industry norms, and the actual requirements
of the project site, ensuring full compliance throughout the system design, equipment selection,
installation, and acceptance testing process. The primary references include:

National Standards

GB50348 Technical Code for Security Protection Engineering.
YD/T 2164 Technical Requirements for 4G Digital Trunking Communication Systems

Industry Norms

Guidelines for the Construction of Emergency Communication Systems in Scenic Areas (2024 Edition).
Specification for the Installation of Wireless Solar-Powered Equipment (T/CECS 1201-2023)

Solution Design and System Architecture

The entire system is built on a 4G wireless network architecture, enabling full interconnection of all terminals via carrier-operated base stations. A SIP server acts as the core control unit, handling signaling processing, device registration management, and media stream forwarding. This ensures stable voice communication and low-latency interactions across the system.

System features

Emergency Alarm

When an alarm is triggered at the terminal:
→ The server pushes GPS coordinates and live video feed
→ A warning pop-up is displayed on the dispatch console
→ Predefined emergency response plans are initiated.

Voice Dispatch

Supports group call, individual call, and broadcast.
Voice communication delay ≤300ms (average measured delay: 187ms).

Video Linkage

During an alarm event, the system automatically retrieves feeds from the three nearest cameras.
Supports H.264 video encoding at 1080P resolution and 25fps transmission.

Device Management

Device Status Monitoring:
The dispatch software provides real-time monitoring of all system devices, displaying statuses such as online/offline and faults. If any abnormality is detected, an alert is immediately triggered to facilitate timely maintenance and repair.
Device Configuration Management:
Administrators can configure device parameters via the dispatch software, including call permissions, volume settings, etc., to meet the needs of different scenarios and users.

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4G Communication Intercom System Solution

Project Background