R800
HANDBOOK
5
2.2. Functional Block Diagram
See Figure 2-1-2 for the functional structure of R800 LTE Router.
Figure 2-1-2 Functional Block Diagram of R800 LTE Route
CPU (CPU, SRAM, FLASH) core processing unit
Serve the following major functions:
Control 3G/4G module dial-up and off-line
IP data forwarding
Operate routing protocol, firewall protocol, VPN protocol and other advanced function
Maintain normal operation of the device
Control the device parameter configuration
Serial port (UART data processing module
The serial port of R800 LTE Router mainly serves to transmit data between the router and the serial port device.
LAN/WAN port data processing module
When the LAN/WAN port of the router is used as LAN port, the data processing module communicates with the lower
computer through RJ45 cable and enables the lower computer to serve the function of IP data forwarding.
When the LAN/WAN port of the router is used as WAN port, the data processing module connects with Internet by way of
cable and enables data transmission in public network.
Ethernet port data processing module
The Ethernet port data processing module of the router communicates with the lower computer through RJ45 cable and
enables the lower computer to serve the function of IP data forwarding.
3G/4G module
This module mainly serves 3G/4G networking function, so as to enable IP data forwarding by the terminal product.
