Westermo GS-01 - Manual (Page 4)

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Functional description
The GS-01 modem provides RS-232/V.24 up to 9 600 bit/s connections over GSM net-
works. It can be used instead of serial cable to link PLC’s, data loggers, security and sur-
veillance system or for data acquisition.
It is possibility to have an external signal (DTR) to trigger the modem to call a pre-set
number. This makes it ideal for alarm monitoring and remote diagnostics from unmanned
stations.
It is also possible to send/receive SMS-messages up to 160 characters as well as fax
functions. It can communicate with other GSM-modems but also traditional analogue
modem such as TD-32 or ISDN-adapters like ID-90.
All configuration is made by AT-commands similar to standard analogue PSTN modems.
The GS-01 uses the standardised GSM network on 900 MHz. This makes it possible for
world wide use (not U.S.A.).
The housing is profiled aluminium and has been designed to be easy to use and simple to
install.
Note! To get the modem to work is it necessary to get a subscription (SIM-card) from
some network provider. To get all functions in the GS-01 to work properly it is
necessary to have the right subscription and that the network provider can support
right services. It is necessary to have a subscription that can handle both receive
and transmit data.
The test function of received signal strength makes it easy to see if it is possible
to get a functional communication link. This can be done without any SIM-card
inserted.
The GS-01 also support voice communication (some external equipment is necessary)
ISDN PSTN
GS-01 GS-01
ID-90 TD-32