ISS 3, SECTION 503-550-101
6748 TRANSMITTER
(BL-W)
OFF
ON
(BRI
KEY
KEY
t
t
TRMTR
Cl
R
l
M
FUNCTION
N
RELAY
FR-2
Q
FR-4
R
s
FR-3
(Y-Sl
53
A
LAMP
VOLUME
CONTROL
FR-1
(81<·0) (NOTE4l
REAR
NETWORK
TERMINAL
c
BOAR
:
(5-BK)
(Y-0)
12
( 81<-C))
IYI
I
(BKJ
B
(WI
T
(OJ
(G·RJ
6
(GJ
(S-R)
Ll
(S·VI
(VI
10
(SJ
4
NOTES:
I. DISCONNECT, INSULATE AND STORE (G -Y) AND ('t-G) HOLD LAMP
KEY
lEADS FROM TERMINALS
10
AND I.
2. WHEN SPEAKERPHONE
IS
FURNISHED W I T H lA KTS,MAKE THE
FOLLOWING CHANGES IN ADDITION TO THOSE SHOWN IN TABLE E:
(O)
AT FRONT TERMINAL BOARD:
e
MOVE (Y) LINE SWITCH LEAD FROM
7
TO II.
e
CONNECT IG-Vl MTG CORD LEAD TO
TERMINAL 8 INSTEAD OF AS SHOWN.
(b)
CONNECT SG GROUND TO SPEAKERPHONE AI LEAD AT EQUIPMENT
3. WHEN SPEAKERPHONE IS FURNISHED WITH IAI OR IA2 KTS, WIRE PER
TABLE D AND CONNECT AI GROUND TO SPEAKERPHONE AI LEAD AT
EQUIPMENT.
4.
IF POLARITY GUARD IS REQUIRED, SEE TABLE G.
(WI
(R-SI
(5-R)
IS-YI
(GJ
(BL-R)
T
FRONT
TERMINAL
BOARD
(NOTE II
*
(NOTE
5)
(NOTE 1 )
L
RO
R4
R 2
K
RS
Ql
A
R7
R3
H
RB
F
R
l
4
E
RIO
RIO
R9
Rll
G
RIS
co
Rl2
C7
Rl3
PRI NTED WIR ING BOARD
MOUNTING
CORD
(0-VI
2
10-Yl
17
(V-Ol
47
(Y-GI
(G-V) !NOTE
2 8
43
23
(V-BRI
49
(V-GI
(NOTE
5
1
48
(V-SI
CONTROL UNIT
50
008
IMO
Ml
7
AI
PI
Rl
IT
Tl
AG
A
0.1
50
I
I
I
(BR-V)
24
(G-YI
IB
(Y-01
42
(O-Wl
I
IR
s
Fl
AI
6
I
3
17
TO KEY
EQUIPMENT
�
TO 20128 TRNSF
TF2
_
�
TO 760A
[
SP2
_3
�
LOUDSPEAKER
SPI
_3�
OPTIONS:
ADO
-t-�
STRAP
0
-·�
®
lA
KTS
®
!AI OR IA2 KTS
5.
lEADS ARE INSULATED AND STORED AND MUST BE TERMINATED AS SHOWN.
*
INSULATE AND STORE
Fig. 11-Connections for Adding Internal Speakerphone to 267181M Telephone Set
Page 13
BSP S03-550·101-i03_1970-12-13.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Apr 29,
2012 21:39:15
