DTU connects to the device through the interface to obtain data, and transmits the data to the designated device through the operator network (2G/3G/4G). Similarly, the reverse data center can also send data or instructions to DTU through the operator network, and then DTU can send data or instructions to the device through the interface.

Function and Features
♦1. Stay online permanently
♦2. Provide serial data bidirectional conversion function
♦3. Internally integrate TCP/IP protocol stack
♦4. Support parameter configuration and permanent storage
♦5.ARM 9 core and Linux system based.
♦6.Supports 2G 3G and 4G LTE.
♦7.Support PPTP VPN. LT2P, IPSEC
♦8.Support NTP and clock synchronization
Software Functions
♦1.Support DDNS, static routing and firewall.
♦2.Network diagnosis，Remote Management
♦3.HTTP Protocol Transmission
♦4.4 connections online simultaneously, TCP/UDPDNS/HTTP/FTP.
♦5.Supports sending heartbeat packet data to network or serial port
♦6.Web Server configuration.
♦7.Dual watchdog timer for stability.