Products / 4G Wireless Transmission Terminal

4G Wireless Transmission Terminal

The CA-DTU80 is a 4G industrial data transmission terminal (DTU) that gives legacy RS485/RS232 field instruments an IP channel. It supports 5 modes and 13 frequency bands across China Mobile, China Unicom and China Telecom 4G, with 3G and 2G fallback, and runs on an embedded Linux system. Configuration is simple: transparent bidirectional serial-to-network transmission, remote parameter setting, remote firmware upgrade, offline alarm, position tracking, signal and traffic monitoring, and SIM management. It is widely used to backhaul data from vibrating-wire, MEMS and GNSS monitoring sensors to a cloud platform.

CA-DTU80 4G Wireless Transmission Terminal

Key Features

  • 5 modes / 13 bands: high-speed 4G access on China Mobile, China Unicom and China Telecom, with 3G and 2G access on China Mobile and China Unicom also supported;
  • Built on an embedded Linux system for high reliability;
  • Multiple working modes are supported: network transparent transmission mode, cloud configuration mode, protocol transparent transmission (UDC) mode and HTTPD mode;
  • Two simultaneous network connections with TCP and UDP support;
  • TCP Server support with up to 8 simultaneous clients;
  • Supports edge computing and cloud polling, enabling terminal device data monitoring with zero development;
  • Supports cloud transparent relaying of terminal data, with companion virtual serial port software and a secondary-development SDK;
  • Serial port data caching of up to 20 packets; cached data is preserved on connection failure;
  • Supports signal quality monitoring and data traffic monitoring;
  • Supports alarms for abnormal signal strength, data traffic overage and device offline;
  • Supports remote firmware upgrade (FOTA self-upgrade) for rapid batch device upgrades;
  • Supports remote parameter configuration for rapid batch device configuration;
  • Supports registration and heartbeat packet transmission;
  • Base-station positioning support, allowing the device's real-time location to be viewed at any time and historical tracks to be traced;
  • Supports socket distribution protocol, allowing data to be sent to different sockets;
  • Supports protocol transparent transmission mode (UDC mode), with server-side secondary development materials provided;
  • Supports AT command set for field configuration
  • Supports remote SMS-based parameter setting
  • Supports plain-text Chinese/English SMS, avoiding the complexity of PDU-mode Chinese messaging
  • Supports FTP client update protocol for remote firmware update of customer terminal devices

Specifications

ParameterValue
Product modelCA-DTU80
Cellular access5 modes / 13 bands — 4G on China Mobile, China Unicom and China Telecom; 3G and 2G fallback
Operating systemEmbedded Linux
Working modesNetwork transparent transmission, cloud configuration (cloud SCADA), protocol transparent transmission (UDC), HTTPD
Network connections2 simultaneous connections; TCP and UDP
TCP serverSupports TCP Server with up to 8 client connections
Serial portRS485 / RS232 (bidirectional transparent transmission)
Data bufferingUp to 20 packets cached; data retained on connection failure
Frame interval (time trigger)50 ms – 60,000 ms, factory default 300 ms (AT+UARTFT)
Frame length (length trigger)5 – 2,048 bytes, factory default 1,024 bytes (AT+UARTFL)
Edge computingSupported; zero-development cloud polling of terminal device data
Cloud relayCloud transparent relaying with companion virtual serial port software and secondary-development SDK
Registration / heartbeatConfigurable registration packet and heartbeat packet
PositioningBase-station positioning; real-time location and historical track
MonitoringSignal quality and data traffic monitoring
AlarmsAbnormal signal strength, data traffic overage, device offline
Remote maintenanceFOTA firmware self-upgrade; remote parameter configuration; remote SMS configuration
SMSPlain-text Chinese/English SMS (no PDU mode required)
Firmware updateFTP client update protocol
Socket distributionSupported — data can be sent to different sockets

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CA-DTU80 4G transmission terminal CA-DTU80 4G transmission terminal

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