4G + BeiDou satellite short message dual-mode communication unit CYD702 designed for remote device monitoring and emergency communication scenarios. By combining cellular networks with BeiDou satellite communication, it ensures reliable data transmission even in locations where public networks are unavailable or during unexpected network outages.
The device supports multiple industrial interfaces and communication protocols, enabling easy integration with various field devices for remote data acquisition, monitoring, and control. With built-in edge computing and local data storage capabilities, it can continue collecting and storing data even when the network is temporarily unavailable, ensuring that information is not lost.
By providing a resilient communication link and a complete data transmission loop, the solution helps organizations overcome the challenges of connecting and managing remote equipment, making it ideal for remote monitoring stations, unattended infrastructure, emergency communication systems, and a wide range of industrial IoT deployments.
Dual-Network Communication for Always-On Connectivity
The device integrates 4G cellular communication and BeiDou satellite short message communication, providing a reliable backup communication channel when terrestrial networks are unavailable.
- Automatic switching between cellular and satellite communication
- Maintains data transmission in remote areas without network coverage
- Ensures communication continuity during disasters or network outages
- Provides a reliable backup link for critical remote equipment
Designed for Remote and Hard-to-Reach Deployments
The solution is specifically designed for environments where network infrastructure is limited or unreliable. It enables stable communication with equipment deployed in remote or unattended locations.
- Ideal for remote monitoring stations and outdoor equipment
- Supports communication in mountains, deserts, forests, and offshore areas
- Eliminates reliance on wired network infrastructure
- Reduces the need for frequent on-site maintenance
Flexible Device Integration and Remote Control
Equipped with multiple industrial interfaces and standard communication protocols, the device can easily connect with various field equipment for monitoring and control.
- Supports RS232, RS485, and RJ45 interfaces for flexible device connectivity
- 2 DO outputs enable remote start/stop control of connected equipment
- Compatible with DL698, IEC104, MQTT protocols
- Supports remote data acquisition, command delivery, and status monitoring
Intelligent Edge Processing with Reliable Data Protection
With its built-in processing capability and storage capacity, the device supports edge computing and offline data storage, ensuring stable system operation even under unstable network conditions.
- Supports local data processing and data compression
- Stores operational data when the network is unavailable
- Automatically uploads stored data after communication recovery
- Reduces bandwidth usage and improves system efficiency
| Red y Protocolo | |
| 4G Red | FDD LTE :B1/3/5/8 TDD LTE：B34/38/39/40/41 WCDMA：B1/5/8 GSM：B3/B8 |
| Network protocol | Supports IP/ICMP/PPP protocols Supports transparent TCP/UDP protocols Supports DNS resolution Supports CHAP/PAP authentication |
| Chipset y Sistema | |
| Chip | 3-Core A7，1.2Ghz |
| Almacenamiento | 512MB+8GB |
| Operation system | Ubuntu22.04 |
| Short Message Module | |
| Receive antenna | Passive |
| Communication byte | Maximum supported 1750 bytes |
| Receiving channel frequency | 2491.75±8.16MHz |
| Receiving sensitivity | •Dedicated band 24kbps information frame ≤ -123.8dBm •Dedicated band 16kbps information frame ≤ -127.5dBm •Dedicated band 8kbps information frame ≤ -130.0dBm |
| Noise figure | NF ≤ 1.8 dB |
| Transmit channel frequency | •Lf1: 1614.26±4.08 MHz •Lf2: 1618.34±4.08 MHz |
| Output power | 36 dBm |
| BPSK modulation phase error | ≤ 3° |
| I/Q offset | ≥ 30 dBc |
| Transmitting port standing wave | ≤ 2 |
| Success rate | ≥97% |
| Cold start acquisition time | ≤2 S |
| Re-acquisition time | ≤1 S |
| Interfaces | |
| SIM card | SIM1: Beidou Short Message Service, Full-size SIM card; SIM2: 4G Communication Card, Mini Card |
| RS232 | 1 × RS232 interface (terminal block) |
| RS485 | 1 × RS485 interface (terminal block) |
| RJ45 | 1 × 10/100 Mbps RJ45 Ethernet port (cable outlet) |
| DO | 2 ports |
| Software Capability | |
| Protocol support | DL698/104/MQTT/Modbus/serial port pass-through protocols, etc. |
| Data compression | Compressed data transmission, local storage, and power-off resume transmission. |
The 4G + BeiDou satellite short message dual-mode communication terminal is designed for scenarios where continuous, reliable communication is critical, especially in remote, mobile, or emergency environments，such as:
- Power & Utilities
- Transportation & Rail
- Maritime & Offshore
- Minería
- Oil & Gas / Energy
- Agricultura inteligente
- Smart City & Infrastructure
- Vigilancia medioambiental
- Emergency & Disaster Management
- Security & Border Control
- Security & Border Control
- Logistics & Remote Asset Tracking
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