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Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 44

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SECTION
503-603-101
TELEPHONE SET
(TOUCH-A-_ T I C)
(6-BUTTON LINE KEY)
149B ADAPTER
R2FK
MOUNT I,N_- CORO
_B
I,_,,'I
/ ss-TYP_
I I_o,_B
(Mo) l _
J TYPE lJ
J"lCONTROL I,,,..IOR
2012D
I POWERI
_
[
I uNIT I
INSIDE WIRE
DIOR CORD,
TRNSF
l
lit VAC
IW, OR CAE4.E
MOUNT I NG CORD
A25B CABLE
117VAC
TO KEY TELEPHONESYSTEM(SEE NOTE)
NOTE:
DISCONNECT
THE
(V-BL) AND
(BL-V) LEADS
IN THE
CABLE
AT
KEY
SYSTEM
END
Fig.
l l--0BIock
Diagram--2872A1M
(MD)
or
2872A2M
Telephone
Set
Using
3B
(MD)
Speakerphone$
Page
44

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