AT&T System 75 Wiring Diagram page 184

PART OF EQUIPMENT ROOM CROSS-CONNECT FIELD
(110-TYPE TERMINAL BLOCKS)
3-PAIR
CONNECTING
BLOCKS
T O
SWITCH
PURPLE
FIELD
4-PAIR CIRCUITS
Figure 3-66. Example of 4-Pair Home Run to Equipment Room or
Satellite Location Using Modular Plug-Ended Station
Cable
3-Pair to 4-Pair Station Circuit Distribution
Figures 3-67 and 3-68 show the 3-pair circuit distribution from an
equipment room cross-connect field to a satellite location using 110-
and 66-type hardware, respectively. Four-pair circuits are distributed
from the satellite location to the information outlets.
4-PAIR
CONNECTING
BLOCKS
BLUE
110P6A
FIELD
PATCH CORD
OR JUMPERS
Station Wiring Design
258A OR
BR2580A
ADAPTER
4-PAIR
CIRCUIT
STATION
CABLE
(DIW)
INFORMATION
OUTLET
3-101