... water supply, environment protection, post, weather, and so on Design for Industrial Applicationa. High-powered industrial cellular module b ... mode, including sleep mode, scheduled online/offline mode, scheduled power-on/power-off mode(optional) d. Housing: Iron, providing IP30 ... 15KV ESD protection SIM/UIM port: 15KV ESD protection Power port: Reverse-voltage and overvoltage protection Antenna port: ...