... CPUs, expansions, various accessories and software, specially designed for GSM/GPRS wireless systems being used for remote measurements, data ... detectors, etc.Highlights at a glanceØ Integral GSM 850/900/1800/1900 modemØ GPRS, SMS and CLIP supportØ Autonomous login ... as slave or master in certain Modbus communication networkØ 1 RS232, 1USB&1RS485 ports availableØ Optional Ethernet InterfaceØ Optional ...