Telit Wireless Solutions GT863-PY - 3 Software Features; Enhanced EASY GPRS Extension; Overview

GT863-PY Terminal Product Description
80269ST10026a Rev. 2 - 18/03/08
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3 Software Features
3.1 Enhanced EASY GPRS Extension
3.1.1 Overview
The EASY GPRS feature allows a user of the Telit GT863-PY to contact a device in the Internet
and establish with it a raw data flow over the GPRS and Internet networks.
This feature can be seen as a way to obtain a "virtual" serial connection between the Application
Software on the Internet machine involved and the controller of the Telit GT863-PY, regardless of
all the software stacks underlying.
An example of the protocol stack involved in the devices is reported:
This particular implementation allows to the devices interfacing to the Telit GT863-PY the use of
the GPRS and Internet packet service without the need to have an internal TCP/IP stack since this
function is embedded inside the module.
The EASY GPRS overcomes some of the known limitations of the previous implementation and
implements some features such as:
• Keep the GPRS context active even after the closing of a socket, allowing the application to
keep the same IP address;
• Also Mobile terminated (incoming) connections can be made, now it is possible to receive
incoming TCP connection requests;
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L1
IP
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Serial Line
Driver
EASY
GPRS
Local
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Data on
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GPRS
TCP/UDP
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Controller
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Telit‘s
Module
GPRS Network and Internet
Remote
Device