AT&T System 75, Wiring Diagram

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Equipment Room Hardware And Cabling Installation
Table 3-H. Auxiliary Lead Appearances at 66-Type Cross-Connect
Field (Contd)
66-Type System System
Z1A 574-5
Conn 75 Auxiliary 75 XE Auxiliary
Emerg Power
Block
Connector
Connector
Xfr Unit Xfr Unit
Term Outputs
Outputs Outputs Outputs
35
36
Not Connected
TK
TK
37
GND
38 48
LC LC
39
GND
40
ACC Power Not Connected
ST
ST
-48
41
GND
TC
COM1
42
-48
N01
43
TK
NC2
44 NC1
45
Not Connected
Ext Alarm A COM2
46
Ext Alarm B
LC
N02
47
Not Connected ST
COM3
48 NC3
49
GRD
50
INADS
INADS
PWR
-48V
Installing Sneak Fuse Panels
The sneak fuse panel (Figure 2-18) must be installed as near as
possible to the network interface. To install the sneak fuse panel,
proceed as follows:
1.
2.
3.
4.
Hold the panel against the mounting surface and mark the upper
right and lower left mounting screw locations.
Drill pilot holes at the marked locations, and partially install the 3/4
inch No. 12 screws.
Slide the sneak fuse panel onto the mounting screws and tighten
the screws.
Repeat the procedure for each sneak fuse panel.
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