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Owner’s Manual Rev 1.0 Page 15 of 15
2. TT4031 (SE-GM29) Modem
2.1 Description
The dual band EGSM 900/1800 MHz TT4031 (SE-GM29) is a GSM/GPRS serial
modem. The modem is a powerful and flexible device that can be used in a
wide range of telemetry and telematics applications that rely on the remote
exchange of data, voice, SMS or faxes via the GSM cellular network.
Small and lightweight, the TT4031 (SE-GM29) has standard connectors and
an integral SIM card reader making it easy and quick to integrate. As well as
providing a standard RS232 serial communication interface the TT4031 (SE-
GM29) also has an audio interface allowing an analogue handset to be
connected. When the TT4031 (SE-GM29) is integrated into an external
application, a wireless communications system is created.
A typical end-to-end system consists of a micro controller in an external
application communicating, via the TT4031 (SE-GM29) modem, with a
remote terminal or host using the GSM network. The micro controller uses a
set of AT commands to control the modem, and to set up the end-to-end
communications link, via its 9-way RS232 serial interface.
TT4031 (SE-GM29) serial modems are intended to be used by manufacturers,
system integrators, application developers and developers of a wide range of
equipment and business solutions, typically in the following fields:
Security and alarms
Vending
Monitoring and control
Utilities
Fleet Management
2.2 Highlights
Dual band, EGSM 900/1800 MHz, GSM/GPRS serial modem
Flexible plug-and-play device
Data: GPRS, HSCSD, CSD, SMS
Voice: full rate, enhanced full rate, half rate
SMS: mobile-originated, mobile-terminated, cell broadcast
Fax: Group 3, Classes 1 & 2