GSM & GPRSTCPIP option Dual & 900 1800 M Hz GSM transmission Supports data SMS voice & fax Accepts standard SIM cardminiature size 88 x 60 x 26mm Can be used on standard GSM network RS232 interface AT command set GSM 07.05 & 07.07GPRS class 10 class 2 One user programmable input Output port Integral SIM card holder Miniature Plug & Play dual band GSM modems can be directly connected to the serial port of a desktop or notebook computer through the RS232 interface. A standard SIM card can be inserted in the integral card-holder within the metal enclosure. The Modems metal casing makes it an appropriate solution for tough applications such as Telemetry Wireless Local Loop payphones or as part of a fleet management system. The small size makes it simple to integrate in a space constraint environment. The modem is supplied with power cable other accessories available are & antenna with 1m coax cable RS232 connecting cable with Telephone interface & a DIN Rail mounting adaptor About GPRS GPRS stands for General Packet Radio Services. The user can remain ON all the time & the data Communication speed rivals that of a cable modem.