The most basic usage of DTU is: put a SIM card with GPRS enabled in DTU, register to GPRS network after DTU is powered on, and then establish a connection with the data processing center through the GPRS network, as shown on the right. This connection involves the wireless network operator, the Internet is wide
With the supplier, the user’s company’s network conditions, and the user’s computer configuration, all parts need to be configured to establish this connection. In essence, DTU and the data processing center establish a SOCKET connection. DTU is the SOCKET client, and the data processing center is the SOCKET server. SOCKET connection is divided into TCP protocol and UDP protocol. DTU and center must use the same protocol. This generally has configuration software for configuration. After configuring the IP address and port number of the center for the DTU, connect the DTU to the user's device through the serial port. As shown in the figure, DTU and hydrology, electricity, meteorology, environmental protection and other equipment are connected and placed on site. After the DTU is powered on, it first registers with the mobile network, and then sends a request packet to establish a SOCKET to the mobile, and the mobile sends this request to the Internet. After receiving the request, the server software of the center establishes a connection and sends a response message. The request information sent by the DTU is a data packet on the Internet. There are some reasons that prevent the center from receiving the connection request packet, so that the connection cannot be established. The most common centered computers have anti-virus software and firewalls to block these data packets. The other is that the central computer is connected to the Internet through the router, and data forwarding must be set on the router. After the SOCKET connection is established, two-way communication is possible.
About the Company
E-Lins Technology was established in 1999, which is the leading professional manufacturer and solution provider in wireless M2M/IoT/In-Vehicle. E-Lins' products dual sim 4g router, industrial 4g modem, gsm router 4g, 4g router with lan port, 4g router with ethernet, etc. are manufactured in-house.
Company Name: E-Lins Technology Co. Ltd.
Address: U valley, Minkang Rd. Minzhi, Shenzhen, Guangdong, China 518000
Telephone Number:+86 (755) 2923 0581
Fax:+86 (755) 8370 0465
Email: [email protected]