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Telephones
and Peripheral Equipment
Power Failure Transfer
,
7. Connect the analog ports from the SLTA to the PFU.
When a power failure occurs, Analog "A" is switched to Trunk "A,:'
Analog "B" is switched to Trunk "B," and so on.
8. Connect a 24 volt external power source to the +24V and GND terminals
on the PFU.
9. Install the cover on the PFU.
Figure j-19. Power Failure Unit (PFU instuUafion
hndoa
Extension Port No. A \
TRK Port No. B
TRKPonNo.C
1
TRK Port No. D -\\\
\\;
4 \\\-Anabgbt.msionPortNo.Al
Power Failure Unit
w43703)
\
To +24V and GND
on Poww slqpbg of
the hwl Caine1
(no pola&abn)
Issued 3/l 195
DBS 824-l O-300
5-23
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