Digital Terminal Data Module (Dtdm) - AT&T DEFINITY 2500 Instruction Manual

CHAPTER
2. DESCRIPTION
The digital display module consists of the following:
.
A 4o-character alphanumeric display
that
includes numerical digits, uppercase and
lowercase letters,
and punctuation marks.
.
An
ON/OFF
switch with an associated light that can be operated as
needed by the
user.
.
Additional Ieature butlons with associated lights. The feature buttons are customer
designated, and may be assigned
to
buttons
on
the vojce terminal
or the
module
itself-
The
feature buftons are:
. fi;r il:l
-
Used
to
place the d'splay in
lhe
normal mode (standard
or
operating
mode).
This mode provides call-related displays for the in-use appearance.
. G;
M.d.l
-
Used
to place the display in the
inspect mode
to permit the user to
see caller identifrcation
on an incoming call or a held
call while talking on another
call.
. h..*"*.;;)
-
Used
to
place
the
display
in the
message retrievai mode. This
mode is used
to retrieve messages
fol
extension numbers having an appearance on
the voice terminal.
. |a
M*
r*r.-l
-
used
to
place
the display in the coverage message retrieval mode.
This mode is used by
a
covering user (secretary) to retrieve messages for a principal
.
lN.,t-
M**] -
Used in message retaieval mode
to
step from one message
to
lhe
next,
. IG.G'J
-
Used in message
retrieval mode to delete messages.
. @
-
Used
to
dispiay
the next
segment
of a
long
message.
A
continuation
character
is displayed
in
the rightinost position for each segment of the message.
. 6;;;iil
-
Used
in message retrieval mode to automatica y initiate
a "return ca
"
to
the caller identjlied by the last displayed message (for inteftal calls
onty)-
. @
-
Used
to
start
or stop the
etapsed timer tunction on
the
disptay module.
Displays
hours, minutes, and seconds.
. G;;;]
-
Used
to place
the display in the time of day and date mode. This mode
initiates a display
of the current time of day
and
the date.
Digital Terminal Data Module
(DTDM)
Adding a oTDM (Figure
2-28)
Lo
a 7403D
ot
7405D voice ierminat gives
the voice terminat the
capability
to transmit and receive data through its EtA RS-232C interface.
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