
Connecting a Power Failure Telephone
Each line board provides one standard 6-position modular jack that interfaces an industry-standard
telephone for power failure operation to line 1 of that board. Pair 25 (pin numbers 50 and 25, clip
terminals 49 and 50) on the line board connector jack provides the power failure connection.
Connecting the System – 33
General Description GCA40–242
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