AT&T System 75, Wiring Diagram

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CHAPTER 3. EQUIPMENT ROOM DESIGN
Port Labels (Purple)
PORT LABELS
The labels shown in Figure 3-35 identify the equipped carrier slots (see
Note) in the switch cabinet. These labels are grouped together (by
carriers) starting with Carrier A. These labels are used for the
trunk/auxiliary field, and the distribution field. They are installed starting
with the first terminal block in either field. The top label is grouped and
numbered in sequence 1A1 to 1A10 and 1B1 to 1B20 through 1E1 to
1E20 to correspond to the cabinet, carrier, and slot of the port circuit
pack. The bottom label must be filled in manually. It is used to label the
MET line circuit pack and the 16-port analog line circuit pack. An
example of how to fill out the label for the MET line circuit pack is shown
in Figure 3-36. An example of how to fill out the label for the 16-port
analog line circuit pack is shown in Figure 3-37. If WP-90929, List 1 or
3 concentrator cables are used to connect trunk or tie trunk circuits to
the switch, then use the labels shown in Figure 3-38 and 3-39 for these
circuits. Figure 3-40 shows an example of how to fill out a dual-purpose
emergency transfer station label.
Note: Equipped carrier slots are identified on the Customer
Service Order (CSO).
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