Dingjian satellite phone handheld terminal uses "Tiantong + Beidou" dual-star collaboration technology to build a full-chain emergency communication solution covering "data collection-transmission-application", effectively solving the communication problem in the three-outage scenario of "power outage, circuit breakage, and network outage". The specific implementation path is as follows：

Double star collaborative technology architecture：

Tiantong Satellite System: It provides voice calls, SMS sending and receiving, and low-speed data transmission services, and its signals cover blind areas of terrestrial networks such as oceans, deserts, and plateaus.

Beidou Satellite System: Supports short message two-way communication (1,000 Chinese characters/coordinate data can be sent at a time), centimeter-level positioning (RTK technology achieves horizontal error ≤ 0.8 meters) and real-time dynamic tracking. During the floods in Hebei in 2025, Beidou short messages accurately located trapped villagers, and cooperated with satellite communications to achieve a closed loop of "monitoring-early warning-rescue".

Extreme environment adaptability design：

Hardware reliability: IP68 dustproof and waterproof grade, operating temperature range -40℃ to+ 80℃, suitable for severe climates such as high temperature, extreme cold, heavy rain, etc.； The 5250mAh large-capacity battery supports more than 10 hours of continuous satellite communication and 72 hours of standby time, meeting the needs of continuous operations such as offshore fishing vessels and field exploration.

Quick response capability: Using satellite-assisted star search technology, satellite connection is completed within 30 seconds, significantly shortening emergency response time ； Dynamic power control reduces satellite communication power consumption by 30%, increases the data transmission rate to 384kbps, and supports high-bandwidth applications such as video calls and telemedicine.

Multi-mode communication integration and scene coverage：

Dual mode switching mechanism: Supports satellite + ground cellular network (such as 5G/4G) dual-mode communication. When the ground base station is damaged due to disaster, it will automatically switch to satellite mode to ensure communication continuity in scenarios where the network and power are cut off.

Full scene application：

emergency rescue: In Qingdao's "Three Breaks" actual combat drill, satellite phones collaborated with drone base stations, 370MHz wireless communication equipment, and self-organizing network technology to build stable communication links and achieve rapid disaster information reporting and command and dispatch.

remote operations: During geological exploration in uninhabited areas of Qinghai, Beidou terminals sent back positioning data and exploration progress through short messages every day. ； In the deep mountain forest protection scene, Beidou short message, RTK positioning, and DMR intercom functions are combined to build a "communication life-saving system."

Meteorological monitoring: Integrate RTK, Beidou short message and single Beidou positioning technology to build an "air and space integrated" meteorological monitoring system .

Industry application：

emergency management: As an important part of the national emergency communications system, it supports customized Hongmeng systems and secondary development, provides one-stop communication equipment application solutions, and strengthens the "three specialties" (special projects, dedicated personnel, and dedicated) management standards of grassroots emergency units.

Safe and autonomous: Use single Beidou positioning technology to get rid of dependence on GPS, ensure data security and controllability, comply with the requirements of the "Meteorological Observation Technology Development Leading Plan (2020-2035)", and avoid relying on third-party communication services.

Dingjian satellite phone is escorted by the "Tiantong + Beidou" double star, combined with core technologies such as multi-mode communication, high-precision positioning, and extreme environment adaptation, to achieve full chain coverage of communication, positioning, and data transmission in the three-outage scenario of "power outage, circuit breakage, and network outage", becoming a core equipment in disaster prevention and reduction, emergency rescue, remote operations, and other fields.

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.