GT863-3GG Product Description
80269ST10077a Rev.0
–
2010-09-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved.
Page 26 of 37
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Keep the WCDMA/EDGE/GPRS context active even after the closing of a
socket, allowing the application to keep the same IP address;
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Also Mobile terminated (incoming) connections can be made, now it is
possible to receive incoming TCP connection requests;
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A new internal firewall has been implemented in order to guarantee a certain
level of security on internet applications.
7.1.2.
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.
