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800.10
CO/pBx CONNECTIONS
An FCC approved
RJ21X connector
should
be
supplfed
by the Telco at the demarcation
point.
The RJ21X
should
be located
within
25 ft. of
the KSU.
All CO/PBX
line
connections
are
made on the Pl and P2 cables. The Pl connec-
tor is located
fn the Basic KSU and the P2
connector
In the Expansion
KSU.
A COB or
COA card must
be installed
in the associated
KSU card
slot
in order for the CO/PBX
line
interface
connections
to be established.
Refer
to Tables 500-l
and 500-2.
600.11
AMPLIFIED
CENTRAL
OFFICE
IN-
TERFACE
BOARD
There are eight CO line circuits per card. Each
card has
a
jumper
strap
(one for each of the
eight CO circuits)
which is set by the installer
during
installation
for either 0 db (no gatn) or
+3 db (gain). Refer to Figure 500-10.
Gain/no
gain affects multi-line
conferences
and trunk
to trunk
DISA
or off-net
forward)
calls.
All
other
installation
requirements
are the same
as for the standard
COB. When Amplltled
CO
connections
are desired
it is recommended
that all CO boards
in the system
be replaced
with COA boards.
500.12
STATION
CONNECTIONS
There
is a 50-pin
female
amphenol-type
con-
nector
on each station
KIB, KIB/OHV.
SIB and
OPX card.
These allow the system to be cabled
to the main distribution
frame (MDF). Twenty-
five pair telephone
cabling
must
be prepared
with
mating
connectors
to extend
the KSU
interface
circuits
to the MDF.
The cables are
routed
through
the cable clamps at the bottom
of the KSU to the MDF.
These cables are then
terminated
on industry
standard
66Ml-50
type
punchdown
connector
blocks.
Refer to
Tables
500-3.
500-4,
and 500-5.
It is recom-
mended
that 66Ml-50
split blocks with bridg-
ing clips be used to simplify
troubleshooting
and to quickly
isolate faults.
The amphenol
type connectors
will be on the
front
edge of the printed
circuits
boards which
are plugged
into the green colored
card slots.
These connectors
require
male plug-ended
ca-
bles for proper
attachment.
The actual quan-
tity of cable required
depends
on the size of the
system.
Each time a station
card is added to
the system.
another
connector
is required.
A
maximum
of six station
boards can be instailed
in the basic KSU.
After the amphenol
type cable connector
has
been attached,
the cable should
be anchored
to the cable clamps
at the bottom
of the KSU
Inji.nite
4096
Hybrid
Key
Telephone
System
INSTALLATION
with tie wraps
in order to prevent
accidental
discon.necUon.
The
Expansion
KSU contains
four
station
slots. Refer to Figure
500-3.
500.13
POWER
FAILURE
TRANSFERAND
U3c CONNECTIONS
The Power Failure
Transfer
Unit contains
the
Loud
Bell Control
contacts.
The package
should
contain:
-
1PFr
-
1 two-connector
terminal
strip
-
1 amphenol
clip
-
2
jack screws
-
4 washer
screws
-
1 plastic
terminal
strip protector
A. Power Failure Transfer (pm
A maximum
of two,
optional
Power
Failure
Tmnsfer
Untts
IpFl7
can be installed
in the
Basic KSU. In the event of a commercial
power
failure,
up to six CO/ PEiX lines per PFT can
automatically
transfer
to single line telephones
for emergency
communicaUons.
These SLTs
can be either
rotary
or DTMF
but
must
be
equipped
with CO powered
ringers.
These SLT
stations
do not have to be used for Intercom,
but can be if so desired.
The PFI' also provides
the contact
closure
for
Loud Bell Control/CO
Line Control.
The PFT
has a 50-pin
male amphenol
connector
that
allows a
25-pair
cable to be installed
and ter-
minated
at the MDF.
Refer to Figure
500-12
and Table 500-6
for PFT
connections.
B.
Loud Bell Control
('LX)
The In&fte
4096 System provides relay contact
closure
to activate
optional
external
signaling
equipment
during
incomfng
CO line ringing
or
to activate
ancillary
equipment.
The stations
for Loud Bell Control
are selected
as part of system programming.
Either or both
of the LBC circufts
may be assigned
to any one
station,
to separate
stations
or to a CO Line to
provide
contact
closure
while that CO Lfne is
busy.
The dry contacts
will follow the rfnging
condition
of that station
or will remain
closed
when assigned
to a CO line.
The LBC contacts
are installed
underneath
the
PFT in the Basic KSU. Refer to Figure
500-3.
a. Using
the two jack
screws,
mount
the
two-connector
terminal
strip to the BKSU.
Issue
1, January
1992
5oGll
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