AT&T 1040 - Manual (Page 10)

4
Getting started
Display screen messages
AC FAIL
There is no AC power to the set. If a good battery
is installed, basic phone operation is supported,
(such as making and answering calls on the
handset.) Speakerphone, headset and call privacy
are not supported. The handset volume will be at
the minimum level and only the two lowest levels
will be available for the ringer volume.
DND
The Do Not Disturb mode is on.
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Flashes when the mailboxes of the DTAD mailbox
1080 telephone are full or when the auto
attendant of the DTAD mailbox 1080 telephone
is off. (XX is the total number of new system
extension messages recorded for this 1040
telephone. YY is the total number of all system
extension messages recorded for this 1040
telephone.) DTAD: XX/YY
LCD CONTRAST
Your set's display provides important information.
You can adjust the screen contrast to one of eight
levels to optimize readability in different lighting
conditions.
1. Press [ENTER].
2. Press [ ] or [ ] until you see SPECIAL OPTIONS.
Press [ENTER].
3. Press [ ] or [ ] until you see LCD CONTRAST.
4. Press [ ] or [ ] to select the screen contrast
level (1-8).
5. To move to the next feature, press [ ].
-OR-
To exit setup, press and hold
[ENTER].
SPECIAL OPTIONS
LEVEL-4
LCD CONTRAST
(EMPTY) The one-touch location is empty.
EXT XX RING
There is an incoming Centrex call.