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DTU of Industrial Wireless 4g Routers

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E-Lins Technology - 4G Router Manufacturer

The data transfer unit DTU is a wireless terminal device specially used to convert serial port data into IP data or convert IP data into serial port data for transmission through a wireless communication network.


1) Internally integrated TCP/IP protocol stack


GPRS 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 GPRS MODEM; it has GPRS dial-up Internet access and TCP/IP data The function of communication.


2) Provide two-way conversion function of serial data


GPRS DTU provides serial communication interfaces, including RS232, RS485, RS422, etc., which are commonly used serial communication methods, and most of GPRS DTU designs serial port data into a "transparent conversion" method, which means that GPRS 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, GPRS DTU can be connected with various user equipments that use serial communication, and there is no need to modify the user equipment.


3) Support automatic heartbeat and stay online permanently


One of the advantages of the GPRS communication network is to support GPRS terminal equipment to be permanently online. Therefore, the typical GPRS DTU is designed to support the permanent online function. 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), and support automatic reconnection after disconnection , Automatic redial and other features.


4) Support parameter configuration, permanent storage


As a kind of communication equipment, GPRS DTU 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, GPRS 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.


5) Support user serial port parameter setting


The serial port parameters of different user devices are different. When the DTU is connected to the serial port of the user device, the DTU terminal must be set according to the actual parameters of the user device serial port to ensure the normal communication and reliable data transmission of the user device.


The more professional GPRS DTU also provides some extended functions, mainly including: support for data center domain name resolution, support for remote parameter configuration, remote firmware upgrade, support for remote SMS/phone wake-up, support for local serial port firmware upgrade, provide SMS channel, provide DTU online, Offline level indication, etc.


More advanced DTU can also provide users with secondary development functions; for example, communication plug-ins, DLLs, and interface documents, so that users can transform DTU according to their actual conditions, improve DTU products, and make them more suitable for their own needs.


For more information, please visit E-Lins Technology!

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E-Lins Technology - 4G Router Manufacturer
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