G3GSM000产品概述
The G3GSM option card allows the user to add GSM/GPRS cellular modem capability to their G3 operator interface terminal. GSM/GPRS is the most prevalent cellular technology in today's markets. GPRS can be used for services such as Wireless Application Protocol (WAP) access, Short Message Service (SMS), and for Internet communication services such as email and World Wide Web access. The G3GSM modem option card is quad-band, allowing it to work in frequencies across Americas, Europe and Asia. US and Canada work in the 850/1900 MHz bands, while Europe, Middle East, Africa and most of Asia work in the 900/1800 MHz GSM/GPRS frequencies.
The G3GSM requires the addition of a SIM (Subscriber Identity Module) card, which is inserted into the holder prior to installation of the G3GSM card. The SIM card securely stores the service-subscriber key (IMSI) used to identify a subscriber, and is used to connect to the network to obtain an IP address from the provider.
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