... WiFi devices with only basic configuration. It has been widely used on M2M fields, such as intelligent transportation, smart grid, ... , including online detect, auto redial when offline to make router always onlineEthernet port: 1.5KV magnetic isolation protectionRS232/RS485/RS422 ... between LTE/ WCDMA and WAN(PPPOE, ADSL) (optional) Support VPN client(PPTP, L2TP, OPENVPN, IPSEC and GRE)(only for ...