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Installing Telephones and Adjuncts
Table 3-2. Insert Labels
Color
What It Identifies Special Features
Light blue
DIW cable originating
The fourth pair of the
at telephone outlets in
DIW cable to MLX
offices or other
telephones is reserved
locations
for supplying power to
one DSS at an operator
console.
White
Various types of riser
(house) or campus
cable connections
Gray
Closet letter and circuit
Used with 25-pair tie
number
cables that link large
riser closets and
smaller satellite closets
or two riser/satellite
closets
Green
Central office pairs
Used only on the trunk
or auxiliary field in the
equipment room
Purple
System-common
Usually supplied with
equipment, such as a
the system-common
PBX or a data switch
equipment
Continued on next page
3-68 Connecting the Telephones to the Control Unit