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INSTALLATION INSTRUCTIONS
SECTION 200-255-205
JANUARY 1993
CHAPTER 5
MDF ARRANGEMENT
1.00 All connections
from the system
to external
equipment,
such as trunks, stations,
data interface
units, etc., are made via a customer-provided
main
distribution
frame (MDF).
1 .Ol Cables with male amphenol-type
connectors
are attached
to the connector
panels of the basic
and expansion
cabinets
and secured
with the con-
nectorlocking
bar (Figure51).
Plasticcableclamps
are provided
along the base of the basic cabinet to
secure cables. The opposite
ends of the cables are
then terminated
on 66-type quick-connect
terminal
blocks on the MDF (split blocks with bridging
clips
should be used to allow for fault isolation).
A typical
MDF layout is shown in Figure 5-2. Connect
each
cable from the basic and expansion
cabinets to one
side of the block and external equipment
cables to
the other side. Use bridge clips to make the connec-
tions.
1.02
FCC regulations
prohibit unregistered
equip-
ment from being terminated
on the same block as
CO trunks.
It is good practice
to separate
trunks
from all other equipment
at the MDF.
1.03
Table
5-I
shows
the connector-card
slot
match-up.
Table
5-2 lists the connector
cables
required
for the system.
Each connector
provides
the interface
for only a single card slot.
1.04 To protect
against
transient
voltages
and
currents
beyond what is provided
by simple primary
protectors,
the Underwriters' Laboratories'
Standard
1459 2nd edition
lists secondary
protectors
that
should be installed
if there are outside
leads. See
Figure 5-3 for these conditions.
FlGURE5-l-CONNECTORLOCKINGBAR
Install and test the secondary
protectors
per the
installation
instructions
of the applicable
U.L. listed
manufacturers:
l
Centron Corp., Anaheim,
California92807:
Model
08450.
l
Curtis Mfg. Co. Inc., Jaffrey,
New Hampshire
03452:
Model Diamond
Chip.
l
Oneac Corp., Libertyville,
Illinois 60048: Models
OnLine
614 and OnLine
DG/S.
l
Siemon
Co., Watertown,
Connecticut
06795:
Models
PM-2305
and CPM-2
Plus.
l
Simplex Time Recorder
Co., Gardener,
Massa-
chusetts
01440:
Models
2081-9027
and 2081-
9028.
5-1
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