... modem with rs232 rs485 io for m2m meter readinggprs modem(DTU) with I/OF2114 GPRS IP MODEM is a kind of ... M2M fields, smart grid, industrial automation, telemetry, finance, POS, water supply, environment protection, post, weather, etc. High-performanceSupport TCP server ... /900/1800/1900MHz(optional)Compliant to GSM phase 2/2+GPRS class 10, class 12(optional)Bandwidth85.6KbpsTX powerGSM850/900: ...