DTU(Data Transfer unit) is a serial port terminal, used for the Data between the serial port and IP conversion. E-lins industrial-grade 4g sim router DTU works by utilizing industrial-grade wireless cellular modules and carriers to provide the network. Both 4G & 5G routers can support a serial port RS232 or RS485.

1. Serial RS232 or RS485 on E-Lins 4g sim router
DTU(Data Transfer unit), in simple terms, is a serial port terminal, used for the Data
between the serial port and IP conversion. Industrial serial port terminals mainly
include 4G/NB wireless data terminals, Ethernet serial port terminals, serial port to
wifi terminal, etc. The device provides a serial port to network function, which can
convert RS232/485/422 serial port into TCP/IP network interface. Realize the
transparent bidirectional data transmission between RS-232/485/422 serial port and
TCP/IP network interface. The serial port equipment can immediately have TCP/IP
network interface function, connect to the network for data communication, greatly
expand the communication distance of serial port equipment, products are widely
used in power, environmental monitoring, vehicle, water conservancy, weather, street
monitoring, heat pipe network, coal mine, oil field and other industries.
Basic functions of DTU
Dtus acquire data through interfaces to terminal devices, and then transmit it
wirelessly to designated data centers or devices through the carrier's cellular network.
At the same time, the data center can send data or instructions to the DTU over the
carrier network, and then the DTU sends the data to the terminal device through the
interface.
(1) Integration of TCP/IP protocol stack
The TCP/IP stack (the sum of a series of network protocols) is the core backbone of
network communication, defining how electronic devices access the network and how
data is transferred between them. Colloquially speaking is, a host of data to go through
what process can be sent to the other host.
(2) Two-way data conversion
Converts common serial ports such as RS232, RS485, and RS422 into TCP/IP data for
transmission.
(3) Supports user-defined heartbeat packets
General DTU is designed to support permanent online, with automatic dialing on the
boot and heartbeat packets and other functions, when there is no data for a long time,
it can also stay online.
(4) Parameter configuration
The baud rates of data center IP addresses, serial ports, and port numbers vary in
different IoT applications. Therefore, DTU terminals must support parameter Settings

2. to adapt to different applications. E - Linus industrial-grade routers DTU function
selection of baud rate are as follows:
300/1200/2400/4800/9600/19200/38400/57600/115200 BPS
E-lins industrial-grade 4g sim router DTU works by utilizing industrial-grade wireless
cellular modules and carriers to provide the network. They use high-performance
industrial-grade 32-bit communication processors and embedded operating systems.
And under the synergistic action of RS232(or RS485) interface, the router is directly
connected with the serial port device, so as to achieve a transparent data transmission
function.
DTU has been widely used in electric power, environmental protection, LED
information release, logistics, hydrology, meteorology and other fields. The application
scenarios are different, but they all use the same basic principles.
By communication modes, the E-LINS DTU adopts 2G/3G/4G/5G and WiFi
By interface type, E-LINS DTU supports RS-485/RS-232(DB9 or terminal block), and
DI/DO(Serial port).
Now E-Lins not only has 4g, but also 5g industrial grade routers. Such as H685 and
H900 series 5g routers. Both can support a serial port RS232 or RS485. If interested
contact us any time.