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2.1.2 Front Panel Switches
The following table describes the Front Panel Switches:
Switches
Description
A/O
Pressing the button will set the modem in originate mode and releasing it in answer
mode.
This switch only determines modem operation if the modem is made to go off-hook
manually. Or else the ATD or ATA command will automatically determine the
mode.
D/V
Switches the modem into data mode or voice mode. (the telephone is connected to
the line).
Warning: If the A/O switch is pressed while the modem is being turned on; the modem
will jump into a special kernel program that allows you to upload new firmware into the
modem from a computer. If this is not what you intended, turn off the modem and then
turn it on again to return to normal operation.
Modem Installation
Table 2-2 Front Panel Switches
U-90E Data/Fax Modem
2-3
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