5 INTRODUCTION
Satel Oy is a Finnish electronics and Telecommunications Company specialising in the design and
manufacture of wireless data communication products. Satel designs, manufactures and markets
radio modems intended for use in applications ranging from data transfer to alarm relay systems.
End users of Satel products include both public organisations and private individuals.
Satel is the leading European manufacturer of radio modems. Satel radio modems have been
certified in most European countries and also in many non-European countries.
GFU30 is a variant of the standard SATELLINE-M3-TR4 (YM7410) radio modem.
5.1 Description of the product
GFU30 is a UHF radio transceiver modem. It provides a transparent data link with other GFU or
SATELLINE-3AS and -EASy family modems.
Figure 1.1 GFU30 radio data modem
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