Check up the COM port settings. Enter "Start/Settings/Control Panel". If you have
Windows XP, switch "Control Panel" to classic Panel. Open "System/Hardware/Device manager. In
"Device manager/Ports COM and LPT", select that COM port to which your PBX is connected
twice click by the mouse on it, open "Properties/Port parameters". In the opened window enter next
parameters:
Baud rate (bps) - 9600
Data bits - 8
Parity - None
Stop bits - 1
Flow control - None
Press "OK".