AT&T System 75, Wiring Diagram

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Equipment Room Hardware And Cabling Installation
Equipment Room Hardware And Cabling
Installation
Hardware Installation
The procedures, provided in this guide, for installing hardware are
written so that one system technician can do the installation. Procedures
are provided for installing the following:
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Cross-connect field
Cable slack managers
Labels for cross-connect field
Sneak fuse panels.
Installing the Cross-Connect Field
The preferred cross-connect field location is directly behind the switch
cabinet.
Wall Mounting 110A-Type Terminal Blocks
The 110A-type hardware can be stacked in almost any arrangement at
any height or location on the wall. One arrangement is shown in Figure
3-10. The distance between the mounting screw holes on the terminal
blocks is 10-13/16 inches. If a vertical patch cord trough is to used, the
distance between the mounting screw holes is 5-5/16 inches.
Wall Mounting 110P-Type Terminal Blocks
The first terminal block of the trunk/auxiliary field is aligned with the left
side of the switch cabinet (Figures 3-11 or 3-12). This arrangement
allows for growth on the right side of the cross-connect field.
To install the cross-connect field, proceed as follows:
1. If 300-pair terminal blocks are to be installed, draw a level horizontal
line on the wall 47-1/2 inches above the floor (Figure 3-14). If
900-pair terminal blocks are to be mounted, draw a level horizontal
line on the wall 23 inches above the floor (Figure 3-15).
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