GT864-3G Terminal Product Description
80269ST10071a Rev.0 - 14/09/0
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page 26 of 41
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A new internal firewall has been implemented in order to guarantee a certain level of security
on internet applications.
3.1.2 EASY GPRS definition
The EASY GPRS feature provides a way to replace the need of an Internet TCP/IP stack at the
terminal equipment side. The steps that will be required to obtain a virtual serial connection (that is
actually a socket) to the Internet peer are:
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configuring the WCDMA/EDGE/GPRS Access
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configuring the embedded TCP/IP stack behaviour
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defining the Internet Peer to be contacted
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request the WCDMA/EDGE/GPRS and socket connections to be opened (host is connected)
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exchange raw data
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close the socket and WCDMA/EDGE/GPRS context
All these steps are achieved through AT commands.
As for common modem interface, two logical status are involved: command mode and data traffic
mode.
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In Command Mode (CM), some AT commands are provided to configure the Data Module
Internet stack and to start up the data traffic.
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In data traffic mode (Socket Mode, SKTM), the client can send/receive a raw data stream
which will be encapsulated in the previously configured TCP / IP packets which will be sent to
the other side of the network and vice versa. Control plane of ongoing socket connection is
deployed internally to the module.
For more detailed information regarding WCDMA/EDGE/GPRS please consult Easy GPRS User
Guide and AT Commands Reference Guide.
