ZyXEL U-90E User Guide - Page 29

Rear Panel, Warning

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U-90E Data/Fax Modem Table 2-2 Front Panel Switches Switches A/O D/V Description 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. 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. 2.2 Rear Panel The U-90E rear panel is shown below: Figure 2-2 Rear Panel Modem Installation 2-3

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U-90E Data/Fax Modem
Table 2-2 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.
2.2
Rear Panel
The U-90E rear panel is shown below:
Figure 2-2 Rear Panel
Modem Installation
2-3