AT&T System 75 Wiring Diagram page 279

CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
INFORMATION
LOUDSPEAKER
SYSTEM OUTLET
RED
R
T
GREEN
LINE
CORD
T
R
Figure 5-2. Connections for Loudspeaker Paging—278A Adapter
5-6
STATION WIRING
SATELLITE,
SITE, OR
ADAPTER
LOCATION
B25A* OR
A25D† CABLE
PART OF AUXILIARY CABINET‡
25-PAIR FEMALE
CONNECTOR
ON ED-1E443-10
278A ADAPTER
PANEL
T
R
D-181321
KIT
* USE WITH 66-TYPE CONNECTING BLOCK
† USE WITH 110-TYPE TERMINAL BLOCK
‡ AUXILIARY CABINET IS OPTIONAL
PART OF CROSS-CONNECT FIELD
SWITCH SIDE
STATION SIDE
110P6A
PATCH
BLUE OR
CORD OR
WHITE
JUMPERS
FIELD
25-PAIR FEMALE
CONNECTOR
ON ED-1E443-10
C T T
T
R R
C R
BZ1 S Z
SZ1
GRD
S
BY1
S 1
BY2
-V GRD
-48 VDC
POWER
SOURCE
T
R
YELLOW
FIELD
PANEL
T
R
TN763B
S Z
CIRCUIT
PACK
SZ1
PORT
S
S1
A25D
CABLE