User Manual

GE863-PRO
3
Product Description
80285ST10036a Rev. 1 DRAFT- 24/04/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 24 of 53
3.31 Software Features
3.31.1 Enhanced Easy GPRS Extension
3.31.1.1 Overview
The Easy GPRS feature allows a Telit GE863-PRO
3
modules user to contact a device in 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 GE863-PRO
3
modules,
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 GE863-PRO
3
modules 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.
Easy GPRS overcomes some of the known limitations of the previous implementation and implements
some new 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;
Remot
e
Controlle
r
Device
Device
(Internet)
Local
Remot
e
Applicatio
n
Applicatio
n
TCP/UD
P
EAS
Y
EAS
Y
TCP/UD
P
GPR
S
GPR
S
IP IP IP IP
Serial Data
Line
o
n
Driver Board
L2 L2
V.24 V.24
L1 L1
Termina
l
Equipmen
t
Remot
e
Device
(Internet)
network
interworking
Mobile
Terminal
GPRS Network and
Internet
Teli
t
GE863 networks
<<<---------------------------------- Virtual Serial link ---------------------------------->>>