AT&T System 75 Wiring Diagram page 327

CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
The voice pair that connects to a TN742 or TN769 Analog Line circuit
pack port occupies the first pair of the information outlet. The PLS data
pairs occupy the second and third pairs of the information outlet. The
voice and data pairs must be separated at the blue or white
cross-connect field in the equipment room or the blue cross-connect
field in a satellite location.
400C
ADAPTER
353A
ADAPTER
3278
TERMINAL
ANALOG
VOICE LINE
CORD
TERMINAL
FIBER
OPTIC
CABLE
TO
COMPUTER
CENTER
* USE WITH 66-TYPE CONNECTING BLOCK
† USE WITH 11O-TYPE TERMINAL BLOCK
Figure 5-30. System Voice Circuits and PLS Data Circuits Sharing
an Information Outlet
5-54
STATION WIRING
SATELLITE,
SITE, OR
ADAPTER
INFORMATION
LOCATION
OUTLET
USER
ROOM
353A
ADAPTER
TRUNK
FIBER
INTERFACE
UNIT
(TFIU)
356A
ADAPTER
STATION SWITCH
SIDE SIDE
PAIR 1
JUMPERS
PURPLE
BLUE OR
FIELD
WHITE
FIELD
EQUIPMENT
PAIRS
ROOM
2 AND 3
PLS
ORANGE
FIELD
A25B* OR
B25A† CABLE
T
R
TN742 OR
TN769
CIRCUIT
PACK PORT