AT&T System 75 Wiring Diagram page 160

Equipment Room Hardware And Cabling Installation
Labeling Control Carrier Cable (Used With 110-Type Hardware)
Place the appropriate AUXILIARY connector label (Figure 3-30) on the
assigned 110-type terminal block row. On the control carrier cable,
place a yellow auxiliary label (Figures 3-42 and 3-43) on the connectors
at each end of the cable. Write the letters AUX on each label.
Labeling Control Carrier Cable (Used With 66-Type Hardware)
Write the lead designations for the AUXILIARY connector (Table 3-G) on
the 66-type connecting block. If cable labels are to be used, place a
yellow auxiliary label (Figures 3-42 and 3-43) on the connectors at each
end of the cable. Write the AUX on each label. If cable labels are not
available, use a magic marker to write AUX on the connectors at each
end of the cable.
Connecting Control Carrier Outputs Cable
Plug the connector cable in the AUXILIARY connector on the rear of the
control carrier. Route the connector cable through the cable slack
manager to the assigned 66-type connecting block/110-type terminal
block in the yellow field of the trunk/auxiliary field.
The output wiring connections for alarm monitoring, emergency power
failure, accessory power, and the INADS trunk interface is contained in
Chapter 4 of this guide under the heading Miscellaneous Wiring
Installation.
Installing Trunk Cables Between Network Interface, Sneak Fuse Panel, and
Switch Cabinet
The 1-pair CO trunks are installed by the local telephone company in the
green field. Up to 24 pairs may be terminated on each 66-type
connecting block or on each row of the 110-type terminal block. Tie
trunks also appear in the green field with up to eight 3-pair trunks
terminated on each 66-type connecting block or on each row of the
110-type terminal block.
Selecting Concentrator Cables For Use With 110-Type Hardware
WP-90929, List 1 and 3 concentrator cables can be used to connect the
switch cabinet to the 110-type terminal blocks in the purple field. The
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