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Do you know about DTU?

October 30, 2025 By
H685 4G Modem

DTU is widely used in many IoT cases. Then what is DTU and how it work?

This blog will give a brief description for DTU.

E-Lins DTU

1)What is DTU?

DTU stands for Database Transaction Unit, which is also called serial server, IP Modem and industrial IoT terminal device. It can be used as a gateway in some application scenarios.

2)What is the difference for DTU and wireless modem?

The difference between DTU and wireless modem is that wireless modem is a physical tunnel to access network. It does not have OS, working with PPP dial-up connections of PCs to get connected is required. As for DTU, it is a combination of embedded PC and wireless Modem, which is not only used as a modem but also have functions of data protocol conversion and transparent transmission.

3)How DTU Works?

DTU can connect to the industrial SCADA system directly. While in the mode of transparent transmission, the SCADA system is able to communicate by having an individual IP address. When DTU is used as a Modbus network bridge, DTU needs to have a static IP address. In this sense, data interaction with the SCADA system can be accomplished by the Modbus protocol. DTU supports smart protocol conversion to meet the communication demands between various protocols. So far, DTU has supported the conversion between Modbus TCP and Modbus RTU, enabling field devices to connect to the SCADA system. E-Lins DTU also supports user-defined login with TCP/UDP, heartbeat monitoring, field identification and keeps link availability.

E-Lins DTU is stable, reliable, easy to use with the features of management and protocol transmission. Compared to other DTU products, E-Lins DTU has the following advantages:

The network signal intensity of carriers varies from region to region. We have single sim or dual sim for choose. Dual SIM DTU is configured with dual SIM cards of different carriers, failover will take into action: it can automatically switch SIM 1 to the SIM 2 network in case the device goes offline.

Meanwhile, E-Lins DTU has multiple management and configuration modes. For instance, local serial port settings, remote Tool & SMS configuration and Device Manager platform for remote centralized management, facilitating the implementations of customer projects and equipment maintenance. Additionally, DTU adds the second serial port design in a creative way to make it has the function of remote maintenance of field terminal devices, which simplifies users to debug serial devices remotely.

4)Who is the best China DTU Manufacturer?

E-Lins DTU is a high-level product launched by E-Lins over decades. During the last 15 years, there are tens of thousands of E-Lins DTU that have been used every year in IoT field, providing reliable and secure remote connections at side of voltage distribution and having created much more product value for users.

In order to meet the changing market, E-Lins keeps on developing more and more excellent DTU products. If you are sourcing DTU, E-Lins is the best China DTU Manufacturer; meanwhile E-Lins is providing IoT 4G Router and IoT 5G Router.