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Description:Overview VISIONTEK 81GU is industrial modem based on GSM technology for rugged industrial usage. VISIONTEK 81GU enables control and monitoring of remote devices using short message service (SMS). Message and source authentication is an added security feature. Process events / alerts can be communicated to pre-configured sources with pre-defined message text. VISIONTEK 81 GU is a very valuable device enabling automation at remote locations using GSM / CDMA technology. Application Areas SCADA System Integrators Automatic meter reading Industrial / Process Automation Telemetry Web browsing Fleet Management Remote Data Logging Manufacturers of Data Loggers / RTUs / PLC Devices Sub-station automation solutions Energy gas and fluid meter manufactures Features Dual/Tri* band 900/1800/1900 MHZ GSM Data, SMS (Text & PDU), Fax, Voice and GPRS (Class 10) Variable DC input voltage Fully compliant with ETSI, GSM Phase 2+ specifications Low power consumption AT Commands 1.8V and 3V SIM Interface RS-232 interface (9 PIN D type female) Complies 6KV surge protection