Bell 832 Guide

BELL SYSTEM PRACTICES
AT& TCo Standard SECTION
503 - 701-110
Is sue 5, September 1 980
832- AND 2832 - TYPE TELEPHONE SETS
IDENTIFICATION, INSTALLATION, CONNECTIONS, AND MAINTENANCE
1. GENERAL
1. 01 Th is secti on co n tains information for the
832- and 2832-type telephone sets. The 832-
(rotary) and
2832- (TOUCH-TONE® service) type
telephone sets
are special plug-ended, 10-, 11-, or
13-button key telephone sets initially designed for
use with the
7A Communication System (COM
KEY* 718). These sets also may be used with
the
21A Communication System (COM KEY* 2152).
For information
on COM KEY Systems, refer to
appropriate section in Division
518.
1.02 This section is reissued to:
• Add information on automatic and manual
DO-NOT-DISTURB feature
• Add D-180990 Kit of Parts, for 4-wire service
• Add D-180883 Kit of Parts, for Electromagnetic
Interference (EMI).
2. IDENTIFICATION
2.
01 The 832BM (Fig. 1), 2832BM, 832CM, and
2832CM (Fig. 2) are modular type telephone
sets and will replace the
832B, 2832B, 832C, and
2832C telephone sets, respectively, which are hereby
rated MD. The 832DM, 2832DM, 832EM, and
2832EM
are also modular sets and are electrically
and functionally equivalent to the 832BM,
2832BM,
832CM, and 2832CM sets, respectively, except that
they have been adapted for wall mounting. The
modular sets will all be equipped with a G15A-50
handset and H4DU-50 handset cord which will plug
into a
616T jack mounted on the left front of the
telephone set base (Fig. 3).
Current production
models of these sets also
are equipped with an
improved line switch and
an improved Automatic
Button Restoral (ABR) feature. Some early
production BM and CM sets were not so equipped.
*Trademark of
AT&T Company.
2. 02 The 832A (MD) and 2832A (MD) are 10-button
telephone sets equipped with a 647G5 key
consisting of a Hold button, seven line buttons,
and two intercom buttons. There is an
apparatus
blank to the right of the dial which may be removed
to
mount a 651C key for RING TRANSFER, a
651D key for Privacy Re lease (PRIV RLS) or a
651F key for RECALL.
If required the privacy
circuit board can be field installed.
2. 03 The 832B (MD), 832BM or 832DM and 2832B
(MD), 2832BM, or 2832DM telephone sets are
11-button sets similar to the
832A and 2832A sets,
respectively, except
that the eleventh button, to
the
right and below the key assembly is equipped
in
the factory for RECALL. This key takes the
amber key cap provided. PRIV RLS and RING
TRANSFER features cann
ot be provided in the
832B, BM, DM and 2832B, BM, DM telephone sets.
If required the privacy circuit can be field installed.
2.0 4 The 832C (MD), 832CM, or 832EM; 2832C
(MD), 2832CM, or 2832EM; and 13-button
telephone sets equipped with the 647G5 key and
also a 647S5 key with buttons for RECALL, PRIV
RLS, and RING TRANSFER. The remainder of
the top key space is blocked off by a collar
assembly. These sets
are also equipped and factory
wired with the privacy circuit.
2. 05 The DM and EM (wall type) sets and BM
and CM (desk type) sets are not interchangeable
due to the mechanical changes in the
handset
hanger and the new 6C1-50 housing.
2. 06 An adapter (833A-50) will be furnished with
each
DM and EM telephone set for wall
mounting. The switchhook of these sets has been
designed to hang vertically to the left of the
housing. The sets
are equipped with a hard-wired
mounting cord which can
be coiled up and concealed
in the
adapter or the cord can be extended down
the wall through a notch in the adapter for
termination to appropriate connector-ended cable.
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A. Page 1

SECTION 503-701-110
HOLD
tiANDSET
HANDSET COR[l
Fig. 1-832BM Telephone Set
All maintenance can be performed on internal
components of these sets without removing the
set
from the wall
2.07 All of the 832- and 2832-type sets provide
the same basic services such as pickup, hold,
button illumination, and intercom. They are equipped
with a loudspeaker to provide tone
and voice
signaling. The level of the tone is adjusted
by a
volume control knob located under the right side
of housing.
Two or more CO/PBX lines may be
conferenced by simultaneously depressing the buttons
associated with the lines to
be conferenced. The
Page 2
two intercom lines may also be conferenced.
Intercom and CO/PBX lines cannot
be conferenced.
Automatic button restoration restores all depressed
buttons to the unoperated position when the handset
is replaced.
2.08 Multiline conferencing is a feature of these
telephone sets. Since there is
no amplification
involved, this type conferencing is limited. When
lines
are conferenced, using this manner of
conferencing, distant stations may have trouble
hearing each other, transmission is not guaranteed.

ISS 5, SECTION 503-701-110
64 755 KEY
Fig. 2-2832CM Telephone Set
Note: •when a telephone set is modified
for 4-wire service, multibutton conferencing
between 4-wire and 2-wire systems is not
recommended
.•
2.09 The 832- and 2832-type telephone sets may
be used with
either the 3-type (MD) or 4A
speakerphone system.
The limited number of mounting cord
conductors places a restriction on the
location of speakerphone components
unless it is desired to give up one
pickup line. Refer to Section
512-620-487 or 512-740-471 for
connection information for the
3-type (MD) or 4A speakerphone
system, respectively.
2.10 Current 832- and 2832-type telephone sets
are available in ivory (-50) only. These sets
will
be shipped with a disposable faceplate. It will
be necessary to order a faceplate separately (Table
A).
2.11 Any station set may be optionally wired to
ring on
one CO/PBX line only, or for
common audible ringing.
Page 3

SECTION 503-701-110
PRIVACY BOARD
616T HANDSET CORD JACK
Fig. 3-2832CM Telephone Set Base
When common audible ringing is wired
to a station other than the attendant
station (Code 0), that station cannot
have the ring transfer option.
Ordering Guide
2.12 For telephone set, faceplate, and replaceable
component ordering guide, refer to Table
A. See Table B for color ordering information.
2.13 The following optional apparatus may be
associated with desk type 832 and 2832 sets
(order as required):
• Kit of Parts, D-180656 (to provide a wall
shelf mounting arrangement) consists of the
following:
1-840362446 shelf
1-840362479 clamp
Page 4
1-801812553 screw
Note: If a (wall type) set is to be installed,
a
OM or EM code set is available.
• Diode, 533K or equivalent (order one for
each rotary dial station to
be restricted)
• 4A Speakerphone (order one each of the
following for each station to
be equipped
with speakerphone).
Loudspeaker,108AA-H (includes 7-foot
D20N
mounting cord)
Transmitter, 680AE-H (includes 7-foot
D8S
mounting cord)
Adapter, 2230-49 (includes 7 foot
M16H
and 25 foot M2FG cord)
Unit, Power,
85B1-49

• Ringer, ElC (MD) or ElCM (one for each
CO/PBX line to be wired for power failure
transfer).
• •Key, 688A (manual do-not-disturb option).
This key is intended for use with the 7A
communication system.
It can also be used
with
21A communication system at stations
not equipped with the HFAI option.
• Kit of Parts, D-180990 (4-wire interface for
the
7A and 21A Communication System)
consists of the following:
1-842533440 relay assembly
1-801809245 (P-180924), 4-40 by 5/16-in.
BHM screw
1-801682956 (P-168295), 6-40
by 5/16-in.
BHM screw (not required for these sets).41
2.14 The following optional apparatus will only
be used with the 832A or 2832A telephone
sets (except as noted).
• D-180487 (A&M Only) Kit of Parts (RING
TRANSFER) order one only per system if
the
attendant station is to be equipped for
ring transfer.
• D-180488 (A&M Only) Kit of Parts (PRIV
RLS) order one for each
station to be
equipped for privacy release.
• D-180591 Kit of Parts (RECALL) order one
for each station to
be equipped for recall.
Note: Only one of the previously listed
features can
be provided.
• D-180486 Kit of Parts (Privacy Circuit Board),
order one for each station to
be locked out.
Can be added to the 832A, 832B, BM, DM,
2832A, 2832B, BM, or DM telephone set.
t Add Color Suffix.
:j: The transmitter and loudspeaker set will
be shipped in one of five promoted colors,
Black (-03), Ivory (-50), Green (-51), White
(-58), and Light Beige (-60).
3.
ISS 5, SECTION 503-701-110
• Transmitter, 683AE-50 (for HFAI feature
of COM KEY 2152) also includes a
DO-NOT-DISTURB Switch
• Adapter, 268A (for mounting 683AE-50
transmitter when using DM or EM type
telephone sets).
INSTALLATION AND CONNECTIONS
3.01 Install telephone sets
at desired locations,
making sure
that any options are installed
before telephone set is connected. See Fig. 7
through
16 for schematics of 832A, 2832A, 832B,
BM, DM, 2832B, BM, DM, 832C, CM, EM, 2832C,
CM, or EM telephone sets, respectively.
3.02 All DM and EM (wall type) sets are shipped
with an 833A-50 adapter, screw, and clip
(Fig.
4) which are used for mounting the telephone
set to a vertical surface. Install the
833A -50 adapter
and telephone set as follows.
(1) Mount the adapter to the wall or vertical
surface as shown
in Fig. 4, using appropriate
fasteners (Section 080-720-105).
If the mounting
cord is to be dressed down the wall,
it is necessary
to pass the cord through the notch
in the adapter
before final attachment of the adapter to the
wall (Fig.
5). If the cabling enters through the
wall, the mounting cord may be contained within
the adapter.
(2) Remove faceplate and housing from telephone
set.
(3) Hang the telephone set on the adapter from
the headed rivets
that protrude from the
base pan (Fig.
5).
Note: It may be necessary to slightly bend
the top slotted portion of the adapter
so the
headed rivets of the base pan will align
properly.
(4) Secure the telephone set base with the clip
and screws
at the bottom of the adapter
(Fig.
4).
(5) Install the telephone set options (see paragraph
3.04).
(6) Replace housing and faceplate.
Page 5

SECTION 503-701-110
Fig. 4-833A-50 Adapter With 268A Adapter and
683AE Transmitter
3.03 A D-180656 Kit of Parts may be ordered
separately for shelf mounting of all
BM or
CM sets. The 840362446 shelf should be mounted
to a wall or vertical surface and, after placing the
telephone set on the shelf, secure set with retainer
clamp and screw furnished with the shelf. Refer
to paragraph
2.13 for ordering information.
3.04 To install telephone set options, the faceplate
and housing must be removed and the dial
lifted from its mounting brackets. Use a KS-21107
type releaser or equivalent to release the faceplate
catch.
Caution: The ten button key in this
set is equipped with special low-friction
plastic parts. Special care is required
when removing or replacing these
keys to avoid cracking or breaking
the plastic hooked end of the latchbar
Page 6
projecting from the end of the key.
When removing a key, avoid twisting
or distorting the hook. When installing
a key, make sure the hook is properly
engaged over the edge of the pivot
arm before tightening the mounting
screws of the key.
Caution: When making wiring changes
in this set involving adding or moving
spade-tipped leads on the terminal
board (e.g., privacy option), extreme
care must be taken to prevent shorting
between terminal positions. Check
for clearance before reinstalling the
dial.
If telephone set is to be used at
attendant station (Code 0) without
ring transfer, remove (V-BR) lead
from telephone set terminal 28; insulate
and store. Otherwise the lamp
under HOLD key will be lighted
at all times.
3.05 Options are installed as follows:
(a) Station Restriction (832-type telephone
set):
(1) Install 533K diode between network
terminals
RR and F. Terminate negative
lead of diode
on terminal F, with positive lead
on terminal RR.
(2) On telephone set terminal board, move
(G) lead from terminal 22 to 4, and (R)
lead from terminal 4 to
22.
(b) Station Restriction (2832-type telephone
set): On telephone set terminal board,
move (G) lead from terminal
22 to 4, and (R)
lead from terminal 4 to
22.
(c) Privacy Circuit (D-180486 Kit of
Parts) 832A, 2832A, 832B, BM, DM,
2832B, BM, or DM telephone set:
(1) Mount privacy circuit board on the two
standoffs located
at left front of the
telephone set base (Fig.
3).

ISS 5, SECTION 503-701-110
Fig. 5-Mounting Telephone Set Base onto 833A-50 Adapter
(2) Fasten circuit board to standoffs using
mounting screws furnished with the
telephone set.
(3) Connect leads according to Table C.
( 4) Refer to paragraph 3.06 for testing the
privacy release key.
(d) Privacy Circuit (D-180486 Kit of
Parts) disabling, 832-type telephone
sets: Remove (0) and (BK) leads of Privacy
Circuit from telephone
set terminal 8 and 12,
respectively, and insulate and store, see Table
E.
(e) PRIV RLS (D-180488 Kit of Parts)
832A or 2832A sets only:
(1) Pry apparatus blank off locating pins.
(2) Press PRIV RLS key on locating pins.
(3) Connect leads according to Table D.
(4) Refer to paragraph 3.06 for testing the
privacy release key.
Note: When PRIV RLS is used, RING
TRANSFER or RECALL feature cannot be
used.
(f)
To Disable PRIV RLS Key: Move
(0-BK) lead of privacy release key from
telephone
set terminal 10 to 15, see Table F.
(g) RING TRANSFER (D-180487 Kit of
Parts) 832A or 2832A telephone
sets attendant station (Code 0) only:
(1) Pry apparatus blank off locating pins.
(2) Press ring transfer key on locating pins.
(3) Connect leads according to Table H.
(4) Refer to Section 518-450-100 for KSU
strap addition.
Pa ge 7

SECTION 503-701-110
Note: When RING TRANSFER is used,
PRIV RLS or RECALL cannot be used.
(h) RING TRANSFER (Position 3 of Top
Key) 832C, CM and 2832C, CM
telephone set.
(1) Connect leads per Table I.
(2) Refer to Section 518-450-100 for KSU
strap addition.
(i) RECALL (D-180591 Kit of Parts)
832A or 2832A telephone sets only:
(1) Pry apparatus blank off locating pins.
(2) Press recall key on locating pins.
(3) Connect leads acccording to Table J.
Note: When RECALL is used, PRIV RLS
or RING TRANSFER cannot be used.
(j) HANDS FREE ANSWER INTERCOM
(HFAI):
(1) If feature is to be added to DM- or
EM-type set, a 268A adapter must be
used as follows:
(a) Mount
268A adapter onto 833A-50 adapter
with two screws as shown
on Fig. 4
with the tabs of the
268A adapter facing
outward from the vertical surface. The
683AE-50 transmitter is secured
by sliding
the transmitter downward between the tabs
on the adapter. The telephone set end of
the
transmitter cord enters the telephone
set and is attached to the telephone
set
base at the small notch on the top edge
of the base panel. The excess cord is
stored in the
833A-50 adapter.
(2) For B, BM or C, CM (desk type) sets,
the
transmitter cord will enter at the rear
of the set.
(3) Refer to Table K for connections.
Note: It may be necessary to slightly reduce
the volume of the 683AE transmitter if
distortion or feedback is noticed when the
HF AI feature is used.
Page 8
(4) •Also included with the 683AE transmitter
(furnished with the HFAI feature) is a
manual DO-NOT-DISTURB switch. Depression
of the switch (Fig.
4) prevents voice signaling,
alerting tone and activation of the microphone.
A distinctive tone is sent to any station
that
is calling another station on dial intercom
when the called station does not want to be
disturbed. The only signal that can be received
by a station or answering position with the
DO-NOT-DISTURB switch activated are tone
ringing and the alerting tone and one way
voice signaling associated with an automatic
signaling intercom.
(k) Automatic and Manual DO-NOT-
DISTURB (DND) Feature, COM
KEY 718 and 2152.
(1) This feature permits a station user to
block any incoming dial intercom and DSS
calls. Use of this feature alerts the calling
party
that the called party does not want to
be disturbed. This is accomplished by returning
an audible tone
(500 Hz, continuous) to the
calling party whenever either the automatic
or manual
DND feature is activated. In COM
KEY 2152 System, a visual signal is also
provided on the DSS console when the manual
DND feature is in use. The COM KEY 2152
System currently provides a manual DND
option but it is only available on station sets
that are equipped with the HFAI option. The
major difference between the automatiic and
manual DND option is
that automatic is
activated only when the station set is off-hook,
while the manual can be activated with the
station on-hook or off-hook.
(2) Refer to (Fig. 17) for telephone set
modification for automatic DND feature.
(3) Refer to Section 518-450-100 for necessary
KTU and KSU connection information with
the
DND feature.
(4) For manual DND feature with these
telephone sets, a
688A key must be ordered
separately and installed as follows:
(a) Attach the key
on the right side of the
telephone set baseplate and under the set
housing.

(b) Modify the telephone set wmng and
terminate the spade-tipped key leads
as shown in the appropriate modificatton
table (Fig.
18).
(c) Refer to Section 518-450-100 for necessary
KTU and KSU connection information
with the DND feature.
(I) Four- Wire Service (D-180990 Kit of
Parts, Ordered Separately):
(1) Mount the relay assembly in the front
right-hand corner of the telephone set
using mounting bracket and screws as shown
in Fig. 6.
(2) Connect the relay spade-tipped leads as
shown
in Table L and Fig. 19.
Note: It will be necessary to run D-Station
wire for 4-wire service due to insufficient
mounting cord conductors.
(3) Refer to Section 518-450-100 for 7A and
518-450-110 for 21A communication system
interconnecting wiring arrangement.
(m) Electromagnetic Interference (EMI)
D-180883 Kit of Parts (ordered
separately).
(1) An amplifier printed wiring board assembly,
equipped with RFI suppression is available
and is a direct replacement for the amplifier
board furnished with these telephone sets
.•
3.06 Privacy Circuit/Privacy Release Test.
(a) Busy out a line using another station (Station
X). At the set with the privacy circuit to
be tested (Station Y), go off-hook on same line.
Station Y should
be locked out. Hang up Station
Y.
(b) If Station X has a privacy release key,
depress it. The lamp under the busy line
will indicate
it is on-hold. Station Y should now
be able to pick up the line on hold. Release
the privacy release key, Station X and Y should
now be bridged. Hang up Station Y.
(c) If Station X does not have a privacy release
key, or a privacy circuit, he can allow Station
ISS 5, SECTION 503-701-110
Y in on the line by just placing the line on-hold
by depressing the Hold button (this also releases
the line button). Station Y should now be able
to pickup the line on hold. Now depress the
same button
at Station X, the stations should
be bridged.
Hang up Station Y.
(d) If Station X does not have a privacy release
key but does have a privacy circuit, he
cannot allow Station Y to bridge onto the call
without excluding himself.
(e) With the line still busied out
by Station X
and Station Y not bridged, depress a different
line
on Station Y and go off-hook. While holding
that line button depressed bridge onto the line
that was busied out by Station X. Station Y
should
be locked out of both lines.
3.07 When installing faceplate, insure that the
collar is
in place on the key. Place the tabs
into slots in front of the faceplate opening
in the
housing and lower slowly over
the dial and key
collar until almost in place. Use a KS-21107 type
releaser or equivalent to release
the faceplate catch
and
seat the faceplate.
3.08 The 647G5 key uses key designation tabs
form E-5837, E-6672, and the 647S5, 651-type
keys use key designation tabs form E-6672.
To
install, squeeze sides of the cap and remove from
key.
Insert designation tabs and replace cap with
locking tabs along the horizontal axis of the key.
3.09 For telephone set station number cards, use
form E-10360, E-10364-
§, or E-10368-§, for
rotary dial sets and form E-10361, E-10365-
§, or
E-10369- § for TOUCH-TONE dial sets.
3.I 0 Refer to Fig. 7 through 16 for telephone set
schematics.
3.11 Refer to Section 512-620-487 or 512-740-471
for connections to 3-type (MD) or 4A
speakerphone systems, respectively.
3.12 Early version of 832- and 2832-type telephone
sets were equipped with a D50AL mounting
cord which require contact
strips to be installed in
the back of the keys. Current production 832-
and 2832-type telephone sets are equipped with a
D50AP mounting cord. The D50AP mounting cord
§ Requires that area code be added.
Page 9

SECTION 503-701-110
842533440
RELAY ASSEI'IBL Y
NETWORK
O.OBS-32 X5/1S-IN.
FH TAPPING SCREW (2)
~ ,,,,,,,., ,,_,,,,.,
4-40 X5/1S IN.
BHI'I SCREW
Fig . 6-.Mounting location for D-1 80990 Kit of Parts for 4-Wire Service.
is a direct replacement for the D50AL mounting
cord but does not require that contact strips be
installed in the back of
the keys.
Page 10
Do not install contact strips in the
back of the key when telephone sets
are equipped with a D50AP mounting
cord. Wires are factory provided in
this cord from the key terminal
plugs to the set terminal board.
Use of contact strips may damage
terminal plugs.
3.13 If Power Failure Transfer feature is to be
provided, use an
external ringer [ElC (MD)
or ElCM] and connect as shown in Table G.
4. MAINTENANCE
4.01 Maintenance of the 832- and 2832-type
telephone sets should be limited to checking
for loose or broken connections and replacement
of items listed under Ordering Guide table
as
replaceable components.

Telephone set should not be carried
by the switchhook since this applies
excessive strain to the line switch
and could cause a trouble condition.
4.02 The current production 647-type key has
been modified for easy lamp replaceme
nt
ISS 5, SECTION 503-701-110
by merely removing the lamp cap and inserting a
553-type tool through the hole in the top of the
button. In early production keys, it is neces
sa ry
to remove faceplat
e, key collar, and button for
lamp replacement.
TABLE A
TELEPHONE
SETS AND REPLACEABLE COMPONENTS-ORDERING GUIDE
FACE·
HAND ·
HANDSET
TEL SET
BASE HOUSING DIAL KEY PLATE*
SET
CORD
LAMP
832BM 832BM
8 32A·50 8CA
64705
832 8·
65 1F
832CM 832CM
832A·50
8CA
64705
833A·
64785
832 DM
84099871 0
6Cl·50 8CA
64705
832B·
651F
832EM
840998736 6C1 ·5 0
8CA
64705
833A·
64785
64705
015A·50
H 4DU·50
51 A
2832 BM 2832 BM
832A·50 35AF3A
651F
2832 B·
2832CM
2832CM
832A·50 35AF3i\
64705
2833A·
64785
2832 DM
840998728
6Cl ·5 0 35AF3A
64705
2832 8·
651F
2832EM
840998744 6Cl·50 35AF3A
64705
2833A·
64785
• See Table B f or co l or suffix.
Page II

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