s
S-DBS Installation Instructions
v1.0
Section 300
Issue 1 August 1990
POWER FAILURE UNIT
The Power Failure Unit (PFU) supports up to four CO PBXlines in case of power failure.
The lines are switched directly to dedicated SLTs (type 500/2500 telephone) for
incoming and outgoing calls.
When power is restored the system will automatically.retum to normal service.
e
1. Wall-Mounting Procedure (See Figure 15 on page 27)
a)
b)
d
4
e)
Remove the two screws from the PFU module and
lift off the upper case.
-
Use the provided wood screw to mount the PFU
onto the wall. The wood scr&v should stick
out from the wall about 5/16th of an inch.
Hook the PFU onto the wood screw and tighten
the screw.
Screw the wood screws into the holes at the
bottom of the lower case.
Cut the knockout parts from the bottom of the
lower case with pliers and remove the clamp
plate.
25
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