Hardware manual

Issue 8 Electra Elite
4 - 12 Installing KSUs
3.1 General Information
3.1.1 Basic KSU
The B64-U10 KSU provides service for outside lines,
Attendant Consoles, and interconnection of the station
terminals. The B64-U10 KSU provides 64 ports and has
two fixed and eight flexible slots. The first fixed slot is
reserved for the CPUB( )-U
( ) ETU in the basic KSU or for
the EXP-U10 ETU in expansion KSUs. The second fixed
slot is for the MIFA-U
( ) or MIFM-U( ) ETU. A Power Supply
Unit (P64-U10 PSU) and backup batteries are provided
with the basic KSU.
3.1.2 Expansion KSUs
The B64-U10 KSU is also used as the expansion unit that
can be attached to the basic KSU to provide an additional
64 ports. Two expansion units can be added to the Electra
Elite 192 system, providing a maximum of 192 ports. Each
expansion KSU provides eight flexible slots and
accommodates 8-channel interface cards. A Power Supply
Unit (P64-U10 PSU) and backup batteries are included with
each expansion unit.
The installation instructions provided in this chapter apply
to the basic B64-U10 KSU and the expansion B64-U10
KSUs unless otherwise specified.
3.2 Removing the KSU Cover
To access the battery, cables, and ETU slots, the front cover must
be removed.
1. Loosen the screw that is located near the ON/OFF switch, on
the right side of the KSU. Do not remove screw from the unit.