Overview Of Telco Wiring - Chamberlain LiftMaster TAC1 Installation And Programming Manual

INSTALLATION
Many phone companies have updated their color standards due to
the use of Cat 5 cable for most phone line installs, and keep
residential and business installs in line with each other. In the new
standard, there is no green, red, black or yellow wires, they have
been replaced by white/blue, blue/white, white/orange, and
orange/white. If the wire is primarily orange with white stripes
then that color is orange/white. Refer to the table below. The NID
labels will most likely have the old coloring scheme on them, and
most telephone wiring components you can purchase will still
reflect the original colors.
Function Old Color Standard
Tip 1 Green
Ring 1 Red
Tip 2 Black
Ring 2 Yellow
NOTES:
• The voltmeter measurement between the Tip and Ring should
be between 48 and 53 Vdc.
• Never run data wires and high voltage wires in the same
conduit. The high voltage wires may interfere with the data
wires and cause the system to malfunction.
• Reversed polarity will not damage the unit, however, some
telephones will not function properly.
Typical Telco Overview With The Unit
>> OVERVIEW OF TELCO WIRING
New Color Standard
White/Blue
Blue/White
White/Orange
Orange/White
Notes about wire connectors
(terminal blocks):
• Wire connectors can be
removed to simplify wiring.
• DO NOT overload wire
connectors. Use ONLY one
wire per hole.
Typical Telco Overview
Home Phone
Ring Tip
NOTE: If the unit will be connected with an
alarm system, you must connect the telephone
line to the alarm system first in the series from
the Telco box. If the units are not connected in
this order, they will not operate properly.
Ring
Tip
Emplacement du
Ring
Alarm System
système d'alarme
Position (Not Provided)
Tip
(non fourni)
5
TEL CO
HOU SE
Alarm System
Telco Entrance Box
Position
Demarcation Point
(Not Provided)
Telco Entrance Box
Demarcation Point
Telco
Home Phone