TO 424B/424C
KTU
TO CONN BLOCK
3 (TO 33A
PT
VO I C E COUPLER )
PR
TO 4568 KTU
TO CONN
BLOCK
I
TO
POIIER
SUPPLY
P/0 457C KTU
K l
I•
-24
A
C2
R4
T l
R3
K l
R6
R2
1 6
-
2
4
8 � -24
7 � -24
5
f--------11•
ISS 3, SECTION 5 1 8-450- 1 00
-24
-24
B
B
R 7
CRI
C4
I•
'I
f---j
R8
R I O
CKTS Ql Q2
R5
CR2
CR3
R I I
TRANS I STOR
CKTS Q3 Q4
R9
C6
Fig. 1 9- Condensed Functional Schematic of 457C KTU (Paging Amplifier Circuit)
button (651D key) to the 832A (A&M only) or
2832A (A&M only) telephone set.
D. D-1 8059 1 Kit of Parts (Recall)
2.32
The D-180591 kit of parts provides a station
the feature of simulating a switchhook flash
or recall.
The D-180591 kit of parts adds an
eleventh button to the 832A (A&M only) or 2832A
(A&M only) telephone set. An 832A or 2832A
telephone set equipped with the D-180591 kit of
parts (recall) is electrically equivalent to the
832B(MD) or 2832B(MD) telephone set.
E.
D-1 80656 Kit of Parts (Shelf for Wall Mounting
Telephone Sets)
2.33
The D-180656 kit of parts provides a method
for wall mounting COM KEY telephone sets.
The D-180656 kit of parts consists of a shelf assembly
(ivory colored) and a retaining clamp. The shelf
will incline the telephone set 15 degrees from the
horizontal to facilitate its use. This kit can be
used with any of the 832- or 2832-type telephone
sets not already designed for wall mounting.
TELEPHONE SETS
A. Full Service Telephone Sets (Table D)
2.34
The 832- and 2832-type telephone sets are
10-, 11-, or 13-button key telephone sets
designed for use with the 7 A Communication System.
The sets are equipped with a loudspeaker for tone
and voice signaling. A volume control is provided
to control the level of the signal. Conferencing
of two or more CO/PBX lines is accomplished by
simultaneously depressing the buttons associated
with the lines to be conferenced. CO/PBX lines
cannot be conferenced with intercom lines. Automatic
button restoration (ABR) restores all depressed
buttons when the handset is replaced. The lamp
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