VISIONTEK 81GC is a highly flexible plug-n-play GSM modem for easy integration with RS-232 and audio* interface. It is equipped with features of circuit switched data, SMS, Fax, Voice and GPRS (Class 10). VISIONTEK 81GC is a perfect solution to use with SMS gateways, access internet while on the move and corporate communications (GPRS, Data transfer & PC Fax even in remote location).