AT&T System 75 Wiring Diagram page 93

CHAPTER 3. EQUIPMENT ROOM DESIGN
d . The 110PC1-300FT is a 300-pair terminal block (110DW1-100) for
use when the wiring is to be field terminated. It provides termination
space for ninety-six 3-pair circuits.
Table 3-B. Distribution Field—300-Pair 110P-Type Terminal Blocks
3-Pair Port Field
(Purple)
110PC1-300CT
The following 900-pair 110-type terminal blocks (Table 3-C) can be
used in the distribution field.
The 110PC1-900CT is a factory assembled 900-pair terminal block.
a.
It is equipped with thirty-six female 50-pin miniature ribbon
connectors that are mounted at the top of the block. The terminal
block provides termination space for 576 3-pair circuits.
The 110PC1-900CB is a factory assembled 900-pair terminal block.
b.
It is equipped with thirty-six female 50-pin miniature ribbon
connectors that are mounted at the bottom of the block. The
terminal block provides termination space for 576 3-pair circuits.
The 110PB1-900CT is a factory assembled 900-pair terminal block.
c.
It is equipped with thirty-six female 50-pin miniature ribbon
connectors that are mounted at the top of the block. The terminal
block provides termination space for 432 4-pair circuits.
The 110PB1-900CB is a factory assembled 900-pair terminal block.
d.
It is equipped with thirty-six female 50-pin miniature ribbon
connectors that are mounted at the bottom of the block. The
terminal block provides termination space for 432 4-pair circuits.
The 110PB1-900FT is a 900-pair terminal block for use when the
e.
wiring is to be field terminated. It provides termination space for 432
4-pair circuits.
f . The 110PC1-900FT is a 900-pair terminal block for use when the
wiring is to be field terminated. It provides termination space for 576
3-pair circuits.
3-10
4-Pair Station Field
(Blue)
110PB1-300CT
110PB1-300FT
3-Pair Station Field
(Blue or White)
110PC1-300CT
110PC1-300FT