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Multiline Telephone Installation Site
The following conditions should be met at the site selected for MLTs.
S
3
E C T I O N
Installation Precautions
I
NSTALLING THE
Before installation and cabling of the KSU, observe the below precautions.
K
S
EY
ERVICE
U
(KSU)
NIT
The Key Service Unit
The B614-B13 KSU is the system cabinet that houses a power supply, battery backup
and fixed slots for installing option/expansion cards. The KSU is wall mounted. (Refer
to Figure 2-1: Front View of a KSU, Pg 45.)
Installation Manual, Chapter 2 – KSU Installation
November 2003, A6-506000-642-01(8508), Release 6.0
Ensure the cable length and line resistance (loop), between the KSU and the
telephones comply with the specifications shown in Table 1-1: Multiline Telephone
Loop Resistance and Cable Length – , Multiline Telephone Loop Resistance and
Cable Length.
Some devices require an external power supply. Select a place where they can be
easily connected to an AC outlet.
Telephones intended for handsfree use should be kept away from areas subject to
loud noise or echoing.
Before starting the work, be sure the KSU power switch is OFF and disconnect the
power cord from the AC outlet.
Do not directly touch the soldered surfaces of the ETUs with you hands.
Extreme care must be taken to avoid STATIC DISCHARGE when handling ICs
and ETUs – an earthed wrist strap must be worn.
Figure 2-1: Front View of a KSU
45
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