GT864-3G Terminal Product Description
80269ST10071a Rev.0 - 14/09/0
9
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 25 of 41
3 Software Features
3.1 Enhanced EASY GPRS Extension
3.1.1 Overview
The EASY GPRS feature allows a user of the
Telit GT864-3G Terminal
to contact a device in the
Internet and establish with it a raw data flow over the WCDMA/EDGE/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 GT864-3G Terminal
,
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 GT864-3G Terminal
the use of the WCDMA/EDGE/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 new features such as:
•
Keep the WCDMA/EDGE/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
V. 24
Serial Line
Driver
EASY
GPRS
Local
Application
V. 24
Data on
Board
EASY
GPRS
TCP/UDP
IP
L1
L2
IP
L2
IP
TCP/UDP
Remote
Application
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Controller
Device
Telit‘s
Module
GPRS Network and Internet
Remote
Device
