User manual

GPRS
If your SIM supports it, you can connect to
the Internet using the higher speed GPRS.
This will provide data rates typically
between 40kbps to 60kbps but this will
depend on network congestion, signal
quality and other variables. Contact your
service provider for details.
It is necessary to add an extra modem initiali-
sation command (see Figure 6):
AT+CGDCONT=1,IP,yourprovider where
“yourprovider” is specified by your service
provider. For example “orangeinternet” is
appropriate for the Orange network in the UK.
You can retain this special command in the
modem configuration even if you use the
same modem for fax.
The dialled number to access GPRS is
*99***1# (see Figure 7).
During a GPRS session, the number of
bytes transmitted (sent) and received is
shown on the display.
GPS navigation data
The DTM will recognise NMEA-0183
navigation data that is available from most
GPS receivers that support an RS232
connection. The connection will require a
cross over cable or adaptor (available from
Burnside Telecom). Once the DTM receives
data from the GPS receiver the DTM will
display the character G (GPS) next to the
signal strength indication to show it is
connected. See section on remote
commands for use of the GPS data.
An RS232 serial interface is provided to allow connection to a computer using
the supplied cable. If your computer does not support RS232 or you do not have
a spare connection, use the optional Burnside USB adaptor. It is also possible to
connect a GPS receiver that supports the NMEA-0183 protocol.
Standard modem
It is possible to set up a standard modem to connect to the Internet or other
computer. When you make a data connection, it is still possible to send and
receive SMS from the handset, but voice calls are not possible. If you attempt to
make a data connection during a voice call, it may disrupt your voice call. You
should avoid making a data connection while a voice call is in progress.
Windows configuration
To set up a connection in Windows XP (Windows 98SE is similar), under control
panel Modems, select Add. Check the “don't detect my modem” option and
select NEXT. Under “manufacturer” select “standard modem types” then select
“standard 19200 bps Modem” under “Models” then select NEXT. A list of
connections will be displayed. Select the one that is appropriate such as COM1.
Now the modem is installed, select “Properties” and then select the “Maximum
Port Speed” to be 115200. Make sure the DTM baud rate is set to Auto in menu
541.
If you want to connect to the internet using this modem connection, create a
new dialup networking configuration in the normal way suitable for your ISP and
make sure the “connect using” is set to the “standard 19200 modem”
You are now ready to connect.
Fax
You can use the DTM to send and receive faxes from a PC using fax software.
We recommend the fax capability that is installed as standard in Windows XP
Professional (free option provided with Windows XP Home). You can send a fax
with most SIMs and services including “pay as you go”. To receive a fax, you
will have to obtain a dedicated fax number from your service provider and this is
normally only available with a contract SIM.
Section 21
Data connection
30 31
Section 21
Data connection
Figure 6: Initialisation string for GPRS
(example shown: Orange UK)
Figure 7: Dial string for GPRS
Use this button to
make sure that the
port connection
speed is also set to
115200 here.
Also select hardware
flow control.