Karel MS128 Installation & Maintenance Guide
Edition 3.2
73
the right most one is used to connect the extension telephone. Then, when the
system power is on, the relevant relay connects the extension circuitry to
extension telephone. When the power is off, the same relay connects the
extension telephone to the relevant line directly. The following figure illustrates
the connections for power failure transfer stations .
Figure B-30
III.10.
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.
Summary of Contents for MS128
Page 1: ...Karel MS128 T e l e p h o n e S y s t e m Installation Maintenance Guide Edition 3 2...
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Page 47: ...INSTALLATION GUIDE...
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Page 55: ...Karel MS128 Installation Maintenance Guide Edition 3 2 47 Figure B 4 Figure B 5...
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Page 85: ...MAINTENANCE GUIDE...
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Page 90: ...Design and specifications subject to change without notice...