AT&T 5140T User Manual page 31

Chapter 3 VTDU
Use/s
Manual
3.
For
all other SV/DT set up
information, refer to the appropriate
SV/DT manual.
NOTE: The receiving end SV/DT of a video call must
be set up in the same tnanner as the transmitting
SV/DT.
Operating the VTDU
The
WDU
is equipped with five
paneltunction
keys
which take on ditferent funclions, depending upon the
LCD screen display.
IMPORTANT:
When
the
LCD screen
dlsplays
lcons, the panel lunctlon keys take on the ldentity
of the lcons;
otherwlse, the panel lunction keys
keep
thelr labeled ldentity.
When the system is initially powered up,
the
Main
Menu
displays on
the LCD screen. The panelfunction
keys
take on their own labeled
identty when you
exit
from the Main
Menu. The following
paragraphs explain
the function and operation of the menu system and
pane! keys.
Remember,
attaching the
WDU
to the secure voice/
data terminal does not compromise the capabilities ol
the
SV/DT. You can still
operate
the SV/DT in normal
mode as if
the WDU were not
attached.
Atso remember that
the WDU has a screen saver
teature to
blank
the
sseen during periods of inactivity.
Panel
Key Functions
Reler
to
Figure
3-3 for the
location
of the panel function
keys.
These keys function as labeled when no icons
are displayed on
the
LCD screen.
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