Open type GSM/ GPRS Modem is offered in compact design that facilitates ease of installation. The GSM/ GPRS Modem uses tri-band GSM/GPRS engine that works on frequencies EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MH. The GSM/ GPRS Modem enable voice functions like call, double sound multi frequencies function and data and facsimile function. Open type GSM/ GPRS Modem comes in different specifications to cater to specific requirement.