User guide

User Guide
5
Once the port/baud rate is set you will find the main PPP settings under the
Deployment, TCP/IP tab.
You need to enter your username and password provided by the airtime company
(this is sometimes blank or a non-user specific value for open networks). You
also need to specify the GPRS dial command for your modem. For the Wavecom
modems the full string is “ATD*99***1#”; the logger will automatically send the
ATD part of the string, so you need only enter “*99***1#” as shown below,
without the double quotes. Finally you need to enter the code or text that the
modem sends back when it makes a successful GPRS connection. For the
Wavecom, when set to numeric response codes as is normal, the code is 21 if
running at 9600 baud (the default), 25 if running at 115200 baud.
In addition you need to program the modem with its APN server setting. This
involves issuing the following command to the modem, where the server name is
as specified by your provider:
AT+CGDCONT=1,”IP”,”servername”
For example for O2 enter:
AT+CGDCONT=1,”IP”,”mobile.o2.co.uk”
There are different ways of entering this setting in the modem. One way is to
append it to the start of the dial string the logger sends which you enter in this
screen of the Device Configuration program, e.g. enter:
‘AT+CGDCONT=1,”IP”,”servername”;ATD*99***1#’
(without the start and end quotes, but with the double quotes within the string).
Alternatively the setting can be set by connecting the modem to a PC using the
relevant serial cable and entering this setting via a terminal program, such as