Telit GE864 and GC864
Product Description
80273ST10008A Rev. 3 - 10/02/06
Reproduction forbidden without DAI Telecom written authorization – All Right reserved – Right of modification reserved
page 45 of 72
5 Software Features
5.1 Enhanced Easy GPRS Extension
5.1.1 Overview
The Easy GPRS feature allows the
Telit GE864 / GC864
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 GE864 / GC864
module,
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 GE864 / GC864
module 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 new Enhanced version
of the 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;
- A new internal firewall has been implemented in order to guarantee a certain level of security
on internet applications.
Remote
Controller
Device
Device
(Internet)
Local
Remote
Application
Application
TCP/UDP
EASY
EASY
TCP/UDP
GPRS
GPRS
IP
IP
IP
IP
Serial
Data
Line
on
Driver
Board
L2
L2
V.24
V.24
L1
L1
Telit
GE864 / GC864
networks
Firewall
<<<---------------------------------- Virtual Serial link ---------------------------------->>>
network interworking
