4G DTU data transmission terminal of Functions and characteristics

Functions and characteristics of 4G DTU data transmission terminal

4G DTU data transmission terminal uses 4G network for transparent data transmission. The device is called 4G network wireless data two-way transparent transmission terminal. The process of converting serial data into IP data or converting IP data into serial data and transmitting is called Transparent data transmission, let's take a look at the functions and characteristics of the 4G DTU data transmission terminal.

　　 4G DTU features:

　　 Connection mode: Support 4G, 2G, 3G, network;

　　Transmission mode: transparent data transmission, configuration software protocol;

　　Transmission protocol: Support TCP, UDP, MQTT, AT command control;

　　Data Center: Support dynamic domain name and fixed IP address access, multiple backup data centers;

　　High efficiency: Cache function, to ensure that data is not lost;

　　 Flexible: Support real-time online, support multiple remote wake-up methods such as SMS, telephone and serial port data;

　　 manageable: DTU can be configured and inquired remotely via SMS;

　　Easy to maintain: Support local firmware upgrade

　　 The four core functions of 4G DTU:

　　1, internally integrated TCP/IP protocol;

4G DTU encapsulates the PPP dial-up protocol and TCP/IP protocol stack and has an embedded operating system. From the hardware, it can be regarded as a combination of embedded PC and wireless 4G MODEM; it has 4G dial-up Internet access and TCP/IP data The function of communication.

　　2, provide two-way conversion function of serial port data

4G DTU provides serial communication interfaces, including RS232, RS485, RS422, etc., which are commonly used serial communication methods, and most of the 4G DTU designs serial port data into a "transparent transmission" mode, which means that 4G DTU can Convert the original data on the serial port into TCP/IP data packets for transmission without changing the original data communication content. Therefore, 4G DTU can be connected with various user equipments that use serial communication, and there is no need to modify the user equipment. It greatly facilitates the transmission process and does not require complicated protocol conversion.

　　3, support automatic heartbeat, stay online permanently

One of the advantages of 4G DTU equipment is that it supports permanent online 4G terminal equipment. Therefore, typical 4G DTUs are designed to support permanent online functions. This requires DTU to include automatic dialing after power-on, and use heartbeat packets to maintain permanent online (when long-term When there is no data communication, the mobile gateway will disconnect the DTU from the center. The heartbeat packet means that the DTU and the data center send a small data packet before the connection is disconnected to keep the connection from being disconnected), product software and hardware return Equipped with watchdog technology, dual protection equipment, automatic reconnection of equipment disconnected, automatic redialing and other features.

　　4, support parameter configuration, permanent storage

　　 4G DTU, as a communication device, has a wide range of applications. In different applications, the IP address and port number of the data center, the baud rate of the serial port, etc. are different. Therefore, 4G DTU should support parameter configuration, and save the configured parameters in the internal permanent storage device (usually FLASH or EEPROM, etc.). Once powered on, it will automatically work according to the set parameters.