Through technological integration and functional innovation, Dingjian multi-mode Tiantong satellite phone has become an "all-round guardian" for guarding the security of no-man's land and national borders. Its core value is reflected in the following three aspects:：

1. Breaking through communication islands: Build a "voice + SMS" dual-channel emergency system

In extreme environments such as uninhabited areas and national borders, ground communication networks are easily paralyzed due to disasters or remote geographical locations, forming "information islands." Dingjian equipment realizes dual-channel emergency communications by integrating Tiantong satellite communications and Beidou short message technology:

Satellite voice calls: When the ground base station is damaged, the equipment automatically switches to the Tiantong-1 satellite system to ensure all-weather voice communication and support real-time communication between the patrol team and the command center.

Beidou short message: Supports sending short text messages and location coordinates within 1,000 words in an environment without a public network to achieve "silent help". For example, when border guards are attacked by stowaways or wild animals, they can send "SOS + coordinates" to the rescue platform through short messages to avoid secondary injuries caused by exposure of the location.

Low power consumption design: The energy consumption of short message transmission is only 1/10 of that of satellite voice calls, extending the battery life of the equipment and adapting to long-term patrol missions.

2. Precise positioning and trajectory tracking: Improve border control efficiency

The uninhabited land has complex terrain and long national borders, making traditional positioning technology vulnerable to interference. Dingjian equipment achieves meter-level positioning accuracy (error 1-3 meters in open environment) through single Beidou + RTK high-precision positioning module, and has three core functions:

Tracking: The movement trajectories of patrol personnel are recorded and uploaded to the cloud via satellite after the network is disconnected to prevent personnel from getting lost.

electronic fence: The command headquarters can set the boundaries of the safe area. When patrol personnel or equipment deviate, an alarm will be automatically triggered and location information will be sent to strengthen the control of key areas.

Anti-interference and fast positioning: Adopt industrial-grade anti-interference algorithm to filter electromagnetic interference in disaster areas ； Satellite-assisted positioning shortens the time to first fix (TTFF) to less than 5 seconds, gaining valuable time for emergency calls.

3. Technology integration and empowerment: Build a "communication-positioning-help" closed-loop system

Dingjian equipment forms a full-scenario solution for border patrol through the deep integration of three major technologies.：

Adaptation to extreme environments: The Beidou satellite orbit has an altitude of 20,000 kilometers and covers a wide range. It can still work stably even in uninhabited areas such as polar regions and deserts.

Accurate data transmission: Combined with dual-mode communication and RTK positioning, an "air and space integration" monitoring system is constructed. In meteorological monitoring scenarios, the equipment can accurately locate temperature and humidity monitoring points in the permafrost layer, and the data is transmitted back to the National Meteorological Center through Tiantong satellites to support disaster early warning decisions.

Emergency response optimization: When border guards are in danger, they can achieve efficient self-rescue through the three steps of "short message for help → satellite positioning → voice contact".

Dingjian multi-mode Tiantong satellite phone uses technological innovation to break through geographical and environmental restrictions and becomes the "life link" and "technological weapon" for border patrols. Its "communication-positioning-distress" integrated capability not only improves the level of security control in no-man's land and national borders, but also provides landmark results in the modernization of China's emergency management system.

Dingjian focuses on the R&D, production and sales of three-proof communication products such as single Beidou handheld terminals, Beidou short message terminals, RTK high-precision positioning terminals, single Beidou explosion-proof intercom terminals, explosion-proof mobile phones, anti-confidential mobile phones, 5G single Beidou law enforcement recorders, satellite communication phones, etc. It supports customized Hongmeng systems, secondary development, and provides one-stop communication equipment application solutions.