FSM103, FSM203 USER MANUAL
3
1. INTRODUCTION
FSM104 is a multistandard modem for asynchronous or transparent data
transmission in 300-3400 Hz voice band. For lower baud rates it uses binary frequency
modulation techniques (FSK), which make it highly immune to interference and noise
and permits extensive voice-band communication link utilization.
The modem supports CCITT V.23 and Cegelec 600Bd communication standards.
Table of programmable channels (Figure 1.) depicts possible utilization of audio band in
FSK mode. In FSK mode the modem can operate in half or full-duplex, point-to-point or
point-to-multipoint mode.
Figure 1. Table of programmable channels in FSK mode
Modem configuration is performed via dip switches setting available at the front panel.
FSM104 is designed for using in SCADA systems mainly based upon power utility
communication networks. Depending on the selected mode, it can communicate
through specialized, private or leased lines, radio links and power lines (PLC).
