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INSTALLATION INSTRUCTIONS
SECTION 500-036-200
JANUARY 1988
must be controlled
by the external
amplifier.
See
Paragraph
10.70
for the correct
volume
setting
sequence.
10.50
Talkback
Amplifier
10.51
A customer-provided
talkback
amplifier/
speaker
may be connected
to the external
page
(8/600)
terminals
on the
left side panel.
10.52
For talkback
operation,
SW2
must
be
set at "600".
The SEPU amplifier
is not used for
the 600-ohm
mode
in order
to permit
a 2-way
voice
path.
10.53
The
EX.SP
volume
control
on the
left
side
panel
does
not
function
in the
600-ohm
7.;rje.
10.60
Background
Music
10.61
BGM
uses the
music-on-hold
program
source
that
is connected
to the MOH
input
ter-
minals
on the
left
side
panel
of the
internal
MOH source
(SMOU).
It is broadcast
through
all
EKT speakers
(under
the
individual
control
of
each station
user) and will be heard
if the m
/
key is operated
with
the
handset
on-hook
and
no line selected.
10.62
As a programmable
option,
the
BGM
from
the MOH
source
can be heard
via the ex-
ternal
speaker
(see Section
500-036-300,
Pro-
gramming
Procedures).
10.63
BGM
is
automatically
pre-empted
when
a page
or ringing
signal
must
be output
from
an EKT speaker
or the external
speaker.
10.64
;jverail
system
E&M volume
is set with
the
BGM
volume
control
on the left side panel
of the dKSU
(see Paragraph
10.70
for the cor-
rect volume
setting
sequence).
The volume
at in-
dividual
stations
is set with
the
lower
volume
control
on the
right-hand
side of the
EKTs.
10.65
If a separate
BGM
source
is connected
via an external
amplifier
on the external
page,
it can
be heard
from
the
external
amplifier/
speaker
only. If required,
the system
can provide
a dry contact
control
signal
for muting
the exter-
nal BGM
when
a page
is in progress.
10.66
To provide
external
BGM
control,
con-
nect the BR terminals
on the left side panel
of
the
HKSU to the
control
terminals
(mute,
MIC
switch,
etc.) on the
amplifier
(see Figure
49).
-w-w-
I
AmDlifier
1
Input
Mute
Mute
1
1
2'
4 1
Ext.
t"
Spkr
output
Volume
,&j=j
1 iL$$
*Strata
Vie only
FlGURE 49-EXTERNAL AMPLIFIER HOOK-UP
10.70
Volume Setting Sequence
10.71
Refer
to Figure
50 and adjust
the vol-
ume
for MOH,
BGM
and External
Page
in the
sequence
outlined
in Paragraph
08.92.
VOLUME
SETTING
CONTROLS
FIGURE 50-VOLUME SEllING CONTROLS
10.72
Adjust
the MOH level first using the fol-
IowinG
$.cc~M~r$:
1) Set the
MOH
volume
control
to its lowest
level (counterclockwise).
2) Lift the handset
on one station
and call an-
other
station
using
two
CO/PBX
lines.
3) At the
called
station,
put the
incoming
call
on hold,
and
listen
on the
handset
(not the
speaker)
of the
calling
EKT.
4) Using
the
volume
control
on
the
MOH
source,
adjust
MOH
to the most comfortable
level without
distortion.
-
5) If a higher
level is needed
than
can be pro-
vided by the MOH source,
turn the
MOH vol-
ume control
slowly
clockwise
to achieve
the
most
comfortable
level without
distortion.
-35-
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