... used on M2M fields, such as intelligent transportation, smart grid, industrial automation, telemetry, finance, POS, water supply ... protection Power port: Reverse-voltage and overvoltage protection Antenna port: Lightning protection(optional) Standard and Convenience ... "Power", "Online", "GPS", "System", "Link/ACT" Antenna Cellular: Standard SMA female interface, 50 ohm, lighting protection(optional ...