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Getting started
1
Register to the GSM network
To be able to attach to the GPRS services your computer must be registered to the GSM
network, i.e. PIN authentication must have been done during the current session. You
have two ways to do so:
If the used SIM card is unlocked, the terminal or mobile will automatically log on to the
network without requesting SIM PIN1.
If the SIM card is locked you can use any terminal program to enter the PIN. The
terminal program should be properly connected to GSM/GPRS modem and configured
for 8 Databits, No Parity, 1 Stopbit, flow control and the recommended bit rate of
57600 bps. IMPORTANT: When PIN authentication has been successful, close the
terminal program to free the communication port. To enter the PIN use the AT+CPIN
command.
Example:
AT+CPIN=1234
OK
Now, quit the terminal program.
2
Define the PDP context
In order to activate a PDP context with the dial up network, a PDP context needs to be
defined before. This means, that the computer needs to inform the network about cer-
tain parameters, so that the context will be activated correctly. The PDP context defini-
tion can be done in several ways:
If no entry has been made in [Extra Settings] of the modem properties (
and the dial up network is started with the phone number *99#, no individual PDP
context values are known. In this case the GSM/GPRS modem will use default val-
ues for the connection. The default values are the ones, which had been used for the
last connection.
NOTE
In some cases it may be required to predefine a PDP context. For example, if the
local network provider requests an APN. In these cases one of the two follow-
ing options must be selected.
If [Extra Settings] of the modem properties have been filled in, the CID is known. In
order to activate the PDP context with the predefined values, *99***<cid># instead
of *99# must be selected as the phone number entry. However, if *99# is selected,
the computer will ignore the predefined values and activate the PDP context with
the default values.
page 12)
17
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