Karel MS224 Installation & Maintenance Guide
Edition 3.2
73
Normally a standard telephone set can be connected as far as 2 km away from
the system by using ordinary copper wires. Depending on the quality of the
wires the distance changes proportionally.
III.9.
FILTER & PROTECTION UNIT
•
I
NSTALLATION
:
The FPBASE unit has a metal base, which has two pear holes. Through these
pear holes the FPBASE unit can be mounted on the wall.
On the top covers of FPBASE and FPEXP units there are four holes, one at
each corner. These holes are used to fix each module to the one underneath.
Three holes on FPEXP are connected to FPBASE unit with plastic holders
whereas the fourth one has a brass card holder with two washers to carry the
chassis ground to the upper modules.
The following figure illustrates the installation of an FPEXP on top of an
FPBASE.
Figure B-27
•
C
ABLING
:
During the installation of FPBASE and FPEXP units, it is very important to
connect the ground of all the units to the chassis ground of the system. For that
there is a special connector on the metal base of FPBASE, which is to be
attached to the yellow ground screw that is located below the rightmost metal
slots of the cabinet (the slots that carry SPS224 Power Supply Module). This
ground is carried to the FPEXP units by way of two washers and a brass card
holder (see Figure B-28).
It should be noted that the directions of the line / extension connections are
also important. The system side of the card is marked with “PABX" and the
external line (or far extensions) side is marked with “PTT" on the card, as
illustrated in the following figure.
Summary of Contents for MS224
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