The PERMACONN system provides two-way communications between monitored sites and the central station. The CSRU 4000 (Central Station Receiver Unit) is a dual SIM 4G receiver that provides a connection to the central station for all Permaconn outstations. It is intended that the CSRU 4000 operates in tandem with an active IP CSRU (virtual Receiver) receiver providing two active paths to the central station automation software. Please note that both receivers will be active all the time and signals can arrive at both ports simultaneously, signals will not be duplicated. The automation software, or buffer software before it, must merge the two data streams into one. The CSRU4000 reports to the automation software using account code 8998 (default code - this can be changed by the Central Station), enabling complete fault / status monitoring of this receiver.