AT&T System 75 Wiring Diagram page 213

CHAPTER 4. STATION WIRING
Adjunct Powering From Information Outlets
Adjunct powering from the information outlet is described in the
DEFINlTY™ Communications System and System 75, and System 85,
Terminals and Adjuncts, Installation and Tests (555-015-104). An
individual power supply is the only source of local power at an
information outlet. Figure 4-10 shows typical connections at an
information outlet using the 400B2 adapter and a D6AP power cord.
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