AT&T System 75, Wiring Diagram

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Equipment Room Hardware And Cabling Installation
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Blue—Leads to information outlets
White—Leads from the cross-connect field to the satellite
locations (3-pair).
Cabinet
Carrier
Slot
Information Outlet
Site/Satellite Closet
Tie Circuit
Floor
Write Floor or
Building Identification
Designations
1, 2, 3 . . . n
A, B, C, D, E
1 , 2 , 3 . . . 2 0
1 , 2 , 3 . . . 5 6 0
A, B, C, D, E, F
1, 2, 3 . . . n
on Label as Required
Building
for Easy Identification.
Figure 3-18. System Label Graphic Symbols and Designation
Nomenclature
Each 110-type label is used to identify 2 rows on the 110-type terminal
block. The upper half of the label identifies the row above it and the
lower half of the label identifies the row below it. The labels are inserted
into the clear plastic designation strips (Figure 3-19) that are furnished
with the 110-type terminal blocks. After the label has been inserted into
the designation strip, the designation strip is snapped into place
3-33