WDT watchdog design to ensure system stability
Adopt a complete anti-drop mechanism to ensure that the data terminal is always online
Ethernet interface built-in 1.5KV electromagnetic isolation protection
RS232/RS485/RS422 interface built-in 15KV ESD protection
SIM/UIM card interface built-in 15KV ESD protection
Power interface built-in reverse phase protection and overvoltage protection
Lightning protection of antenna interface (optional)