Specifications

12 www.westermo.com
GSM 900/1800 MHz …
Extended temperature …
range –25°C to +50°C
(–13 to –122°F)
GPRS, class B, class 10 …
DTR triggered …
-dialling and SMS
Up to 11 data bits …
8 x LED indicators …
Speed CSD up to …
14.4 kbit/s, GPRS
up to 85.6 kbit/s
Speed serial: 300 …
to 115.2 kbit/s
Galvanic isolation …
for power supply
TCP/IP Stack …
GDW-11
GSM modem
The GDW-11 is a GSM/GPRS modem designed for industrial applications that
can be used on 900 and 1800 MHz GSM networks. The modem requires a SIM
card to provide connection to a network service provider.
The modem contains an enhanced TCP/IP stack to allow GPRS (General Packet
Radio Service) connections to be made seamlessly and reliably ensuring maxi-
mum availability of the GPRS connection. If the GPRS connection is broken the
modem can automatically re-establish the link.
Another enhanced feature in the modem includes the ability to make a CSD
connection or send an SMS message when the DTR signal is activated, allowing
the modem to be used in applications where the connected device has no intel-
ligence to initiate a call using AT commands.
If a PIN number is used by the network, this can be stored in the modem to
ensure the availability of the modem after a power failure. The modem can also
periodically re-register with the network, this is required as some networks will
deregister a SIM that has not moved or been active for a period of time.
Intranet
Company LAN
GPRS
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles
Tel : [phone] - Fax : [phone] - Web : http: www.audin.fr - Email : [e-mail]