AT&T System 75 Wiring Diagram page 248

WHEN USING 110-TYPE HARDWARE
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
CENTRAL
OFFICE LEADS
Figure 4-30. Connections at Trunk/Auxiliary Field for DID Make-
Busy Trunk—574-5 Power Transfer Unit
Miscellaneous Wiring Installation
75
100
DID
MB
1 PAIR OF
WIRES
IN-
ADS
WHEN USING 66-TYPE HARDWARE
DID
MB
COM3
NC3
TO NETWORK
INTERFACE
FACILITY
TO
574-5
POWER
TRANSFER
UNIT
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
574-5 POWER
TRANSFER UNIT
4-51