VEGA INSYS Modem GPRS 5.0 - Manual (Page 49)

INSYS GPRS 5.0 serial Connection
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The direct utilization of GPR connections via PPP is not possible if the device is in
active TCP Listen mode.
5.4.1 GPRS APN (PDP context)
E.g.: The Vodafone APN address is
WEB.vodafone.DE. AT+CGDCONT=1,IP,”WEB
.vodafone.DE”
There is basically the option to define several PDP contexts. This one is stored as
context "1".
Note
The PDP context can not be stored permanently; it must be re-
entered every time the device is restarted,
5.4.2 PPP authentification type
To adjust the authentification type to the one used by the PPP client of the appli-
cation, the INSYS GPRS 5.0 serial offers two possibilities:
No authentification
PAP authentification
AT^SGAUTH=0
AT^SGAUTH=1
According to the APN, PPP authentication is required. The necessary information
can be obtained from the customer service center of your provider.
5.4.3 GPRS connection setup
Modem-compatible GPRS connection setup
When dialing this special number, the GPRS
service is activated. ATD*99***#
If a PDP context (AT+CGDCONT) is defined,
such as: the PDP context no. 1, the AT com-
mand will be
ATD*99***1#
The successfully established connection is indicated by the control signal DCD and
the message CONNECT.
After the GPRS connection has been successfully established, the protocol stacks
of the application can start: First the PPP session is started, and then it can be
used for TCP/IP data traffic.