•
I
both
end&
of
the (Y)
and
(BK)
leads
of
the
loudspeaker
set
cord.
(2) Again, with
the
Joudspeaker
set
cord
terminated in the
te
lephone set. run
the
power to the
te
lephone
set
and
connect
to
the
(Y
) and
(8K)
leads
of
the loud>peak
er
set
cord
using spare
te
rm
inals or
0..161488
oonnectors
.t
6-8utton
r.t.phone
Set
3.
09
When
the
107-type l
ou
dspeaker
set
is used
with a key telephone
set.
connect
as
shown
in Table B
and
Fig. 9 [for
107A
(MD))
or
Fig.
10
(for
1078).
3.
10
When the
107
-type loudspeaker
set
is:
used
witha
CA
LL
DIRECI'OR
&e4
bring loudspeaker
cord directly into the telephone
set
(Fig. 4).
Th
e
power
supp
ly may
be
brought into the telephone
set
over spare cord conductors
and
connected to
the
loudspeaker
set
oord using
spare
terminals or
0·161488
connectors.
Insulate the connectors
and
the wing band
or
the cord with tape and
store
..
Insulate
and
store the unused
BL
and
W leads
if
a
1078
is
used.
3.11
To install the 1
07A
(
MD
) and B loudspeaker
sets
using a single-house eable
pair
for
power and signal, refer to Fig. 7
and
8. The coil
with a
1:1
(600:600 ohm) ratio
(94
E
or
equh•atent)
is used
at
the signal input end of the cable pair.
Connect
48
-
\•o
l
ts
de
10
the
secondary (SIMPLEX)
of
the
coil, Install the 0.25
11F
(S42C)
capacitor
and a
619
-ohm resistor
(KS-14603L3A
or equivalent
~istor
between 6000 and 6400 with power rating
of 2 watts minimum)
at
the 107-type loudspeak
er
sel
. The pigtail leads
o(
the
res
i
stor
and capacitor
are
secured under screw terminals inside-
the
loudspeaker
stt
. Thecapacitor blocks direct
current
from the signal input. The resistor provides the
necessary voltage drop in order
to
supply co
rr
ect
voltage
to
the
-loudspeaker
set
and
to
pre
...
ent
the
loudspeaker
set
power supply from short-eircuiti
na
thespeech transmission path. Theblockingeapaei
to
r
Cl
and the dropping
res.
i5tor Rl
must
be added
locally. The leads should
be
cut
short
or insulated
to avoid interference with other component$. The
green and yel
low
cord conductors of the 1
07A
(
MD
)
and
the
Kreen, yellow, blue,
and
white cord
conductors of
the
1078
are
not
used in this
ISS
8,
SECTION
463-221-100
arrangement. They should
be
terminated
as
sh
o
wn
in Fig. 6 and
7.
3.
12
t A
D2N-50
cord
is
available for supplying
SPOKESMAN
servicein
299
1C-type
te
lephone
sets
. The
te
lephone-
set
end is equipped with a
963.type eonneetor
and
the opposite end
has
spade-
tips for
conneoctin.a:
to the \•
Oiee
circuit of the
loudspeak
er
set. either through the loudspeaker
~t
cord
or
directly on the terminaJ
J..
•
4.
CONNECTIONS
4.
01
When
u&ed
as
a
SPOKESMAN
loudopeaktr,
connect
the
107A
(
MD
) and B loudspeaker
sets
to
telephone
set
r«eiver
circuit. whieh is under
eontrol of
the
switc.hhook and of
f-n
ormal dial
contacto (see
Tab
le B
).
4.02 The schematic and a typical connection for
the 1
07A
(MD) loudspeaker is shown in
Fig. 9.
4.
03
The schematic
and
a typical connection
Cor
the 1078 loudspeaker is shown in Fig. 10.
The
(R) a
nd
(G) leads
of
the
06AF.s'l
mounting
cord connect
to
screw termin
als
5
and
6 and
are
speech leadawhen
th•I078
ia
u&ed
as
a
SPOKESMAN
loudspeaker. The (BL) and (\V) leads, terminated
on
scre-w
termina.ls 3 and 4,
are
speech leads for
..
·oiee signaling
on
manual intercom and are not
u&ed
f
or
SPOKESM
AN
service.
The
(Y)
and
(BK)
leads of the 06AF-87
mou
n
ting
cord
are
for
powe
r
connections..
4.04
Fo
r connection to speci
a.l
applications such
as
a
private
sendee
system,
refer
to
appropriate associated equipment sections.
5.
<l'UATION
SPOkSMAH
LOUDSPUJCH
5.
01
Th
e telephone
set
used in conjunction with
the 107·type loudspeaker
set
is used in the
n
or
mal manner. The handset of the telephone
set
mu
st
be
off-hook
to
use the loudspeaker
set
.
5.02 Operate loudspeaker as follows;
(I)
Turn
ch• ON·OFF switch on the face
of
the
107-type loudspeak
er
set
clockwise. This
connects the power
supp
ly
to
the
107·type
loudspeaker set.
