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Infiite
4096
Hybrid
Key Telephone
System
INSTALLATION
a hm3-t
4 (#lo
or larger)
screws
into the
backboard
and tighten
enough
to hold the
weight
of the KSU. Lift the KSU and place
it onto the screws.
When
the KSU is in
position.
the screws can be tightened
and
the KSU is securely mounted.
500.6
LIGHTNING
PROTECTION
The I@.n&
4096 Hybrid Key Telephone
System
should
have Central
Office lines and OPX sta-
tions
protected
with
proper
lightning
surge
arresters.
This
will provide
protection
from
damaging
surges on sensitive
cabling by non-
direct lightning
strikes.
The protection
should
contain
a compliment
of
three-element
gas-discharged
tubes to ground
high potential
surges,
and associated
circuits
to absorb
and fflter lower level surges.
TNs
type of lightning
protection
fs available through
telephone
equipment
supply
houses.
Care
should
be taken to ensure that such protection
devices
are installed
in accordance
with
the
manufacturer's
instrucUon.s
and to ensure that
no more than one set of protectors
be installed
on central
of&e
lfnes at the installation
pre-
mlses.
Improper
installation
can be a serious
safety hazard.
Failure
to provide
the proper
lightning
protec-
tion
will increase
maintenance
expense
and
require
more available
spare parts.
500.6
EXTERNAL
POWER SUPPLY HOUS-
ING
(EPSI
INSTALLATION
NUl73: 77~ second Power Supply
PSI
must
be
added
to the l2xtemal
Power
Supply
Housing
whentheExpanslonKSUtsadded
The External
Power Supply Housing
should
be
wall mounted
onto the same backboard
as the
KSU. The power supply must be located within
three
feet of a separately
fused
15 ampere,
117V ac power
outlet.
A four foot DC output
cord is provided
for interconnection
of the KSU
and External
Power Supply.
A battery
backup
Bypass
Board
fs installed
in the BC slot of the
External
Power Supply Housing
(EPSI. This is
required
to provide
system
power when a Bat-
tery Charging
(BC) card is not installed.
The power
supply
may be located to the left of
the Basic KSU or above the BKSU.
NOlE
lie
right die
of the
Basic KSU shdd
be
reserued
for the lCqansion
KSU.
(Refer to Fig-
ures 500-l
and 500-21
Using
the template
provided.
spot punch
the
mounting
surface
through
the template
four
corners.
Install
four (no. 10 or larger) screws
into the backboard
and tighten
to about
l/8
inch from the mounting
surface.
Lift the EPS
housing
onto the four screws and tighten.
Connect
the DC output
cord of the EPS to the
Basic
KSU by a&ning
the
connector
pins,
pressing
inward.
then turning
the collar of the
connector
clockwise
until tight.
Do not connect
AC power
cord to an
AC outlet
at this time.
500.7
POWER SUPPLY (P6) INSTALLA-
TION
Install
the
Power
Supplylies)
into
the
EPS
housing
by sliding
them
into their respective
mounting
slots. Lock the power supply(ies)
into
the EPS housing
by &ding
the mounting
lock
to the left and
tightening
by turning
clockwise.
Refer to Figure
5004.
Plug the associated
AC IN power cord fnto the
AC IN socket
on the Power Supplyties).
Then
plug the DC cord into the DC output
connector
on the power supplyties).
500.8
BATT'ERY
BACK
UP INSTM&A-
TION
A Battery
Charging
Unit @Cl is an option
that
can be installed
in the External
Power Supply
Housing
and will
maintain
system
operation
during
loss of AC power.
A separate
external
24V dc battery
package
must
be provided.
Do not make
connecttons
with
the
power
applied
to the External
Power
Supply
Housing.
Also remove
power
Tom
the KSU by turning
the power
switch to off (located on the left side of
the BKSU).
Issue
1. January
1992
600-5
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