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TC4221 Digital Display
is part of the main manuals (KI-1579). For programming
Telephone Interface Module installation manual (KI-1681).
information,
see KI-1538, also part of the main manuals.
For programming information,
see the 2524 programming
manual (KI-1629).
Telecenter
1100
The display module is recommended for Telecenter 1100
Telecenter
System 21
systems, which include the CTLl Telephone Interface. See
The wiring diagram for display phones (KM1121) is in the
drawings KM1032 and KM1033 in the CTLl ChronoCom
Installation Drawings manual, KI-1767.
Installation
Right Way
Terminal
side
Mechanical
Note: For Telecenter V and Telecenter System 21 systems,
set each display' s DIP switch before attaching the display to
a telephone. See "Setting the DIP Switch," on the following
page.
Before attaching the assembly to the telephone, install the
nine-inch modular phone cord and anything else that might
be covered by the assembly. Use the double-sided foam to
secure the assembly to the phone. Do not cover anything
with the foam that you might need to remove in the future
(e.g., the cord that runs from the display unit to the phone.
Caution: The foam bonds tightly to any hard surface it
touches. To assure a smooth installation, stick the foam to
the display unit first. Before touching the foam to the tele-
phone, make sure the display is properly aligned.
Wiring
This section tells the basic connections. For details, con-
sult the system manuals listed above and the manufacturer' s
manual for any other component
(e.g., a special-features
telephone).
Observe
Proper Polarity!
This is especially important for the display, which could
suffer damage from several minutes of exposure to reverse
polarity. To avoid damage, promptly disconnect the display
if it does not show the sign-on message a few seconds after
you turn on the system. Check all wiring connections and
the polarity of the modular connectors on the desk cord and
the cord between the display and the phone.
The positive LCD output should be connected to the "BK"
("Black") terminal, and the negative output to the "YL"
("Yellow")
terminal of the telephone terminal block. See
Figure 2 and the wiring table.
Wrong Way
Terminal
side
Tab side
-d
Figure 2. Phone-Connector Polarity
Modular
Cords
From a Modular
Jack to the Display: For a standard
phone, use a standard four-conductor, six-position line cord.
Make sure that the modular plugs' terminals are on the same
side of the cord (see Figure 2).
From the Display Jack to the Telephone: Use the sup-
plied nine-inch
cord.
Connections
Use the following
table or the wiring diagrams listed
earlier for the wiring connections.
Display and Telephone Connections
I
Modular
Block
Terminal
Red
Green
Black (+)
Yellow (-)
Blue
White
Telephone
R
T
TCIV/TCS
LLM
Terminals
R
T
LCD+
LCD-
(shield to Z)
see the
feature
phone' s
manual.
Page 2
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