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AT&T System 75 Wiring Diagram page 260

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TO GROUND
TERMINALS
FIRST
APPEARANCE
Figure 4-36. Ground Wiring Example (Three Telephones Used Only
for Emergency Transfer)
Miscellaneous Wiring Installation
WHEN USING 66-TYPE HARDWARE
TO GROUND
TERMINALS
WHEN USING 110-TYPE HARDWARE
LAST
APPEARANCE
4-63

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