Bell System Practices 2682 Service Manual

BEIL SYSIEM
PRACTICES
AT&TCo Stondord
I.
GENERAL
l.Ol
This section
contains information
for
2682AA
(MD),2682AAM
(MD), or 2862AAMS1
(18-button)
and 2683AA (MD), 2683AAM (MD), or
2683AAMS1
(30-button) TOUCH-TONEo dial, CALL DIRECTORo
type telephone sets.
I.O2
This section
is
reissued
to:
o
Add information on the
2682AAMS1 and
2683AAMS1 telePhone sets
o Update
Fig. 3, 4, and
5
o Show
the
2682
and 2683HAAM sets MD
o
Add the new
8403643?6
polarity
guard
(D-181006
Kit
of
Parts)
l.O3 These sets (Fig.
1, 2, 3,
and
4)
provide
headset
or
handset
oPeration.
r.o4
)The 2682AAMS1
and 2683AAMS1 (S
coded)
sets have
a
new
line switch and
headset
jack.
The
line switch
opens
both the
tip
and ring
side
of the
line.
The
headset
jack is
redesigned
to
operate
in
conjunction
with
the new
line
switch
(Fig. 3, and Fig. 4, Note
13).{
l.o5
They may be
used f.or
2-
or 4-wire
service
on 1A1, 7L2,
6A,
or 68
keY
telePhone
systems.
The
3-type (MD)
speakerphone can
provide
Ubtn Z-
or
4-wire service
per
SD-69542-01'
The
4A
speakerphone
may also be used;
refer
to
paragraph
2.07.1
l.06
The mounting cords
of
these telephone
sets
are
equipped
with individual
plugs
for making
electrical connection
to
the
receptacle blocks of
the
keys, lamp sockets,
or transmitters' Current
SERVICE
2682. AND
2683.TYPE
TETEPHONE SETS
CONNECTIONS
AND
MAINTENANCE
NOTICE
Not
for
use
or
disclosure
outside the
Bell System except under
written
agreement
Printed
in
U.S.A.
sEciloN
502-612-425
lssue
6,
Oclober 1980
production sets
are
equipped
with
a
satin-silver
(-87) mounting
cord.
2.
coNNECTIONS
2.Ol
The2682-
and 2683-type sets can be
equipped
with a
635A5C
(5 line pickup and hold) or
a 635AD5C (4
line
pickup, cutoff, and hold)
in
the
first
module
position.
Contact
strip
assemblies
[required
with
sets equipped
with a D120K (MD)
br
D200S
(MD) mounting cordl
differ between the
two
keys.
If
ordered
for field
replacement, the
635AD5C
is
furnished
with a
piggy-back adapter
to which the slate mounting cord plug is
connected'
See
Table A
for connections. The necessary
contact
strip assemblies
(840151039
and
840151047)
will
be
shipped
with the
635AD5C
and
will
replace the
AaOlBffZO
and
840151138
assemblies supplied
with
the
635A5C key.
Note:
Contact
strips are not
required with
sets
equipped
with
a
D120M
or
D200AA
mounting cord
or
sets
equipped
with
a
modified
D120K
or
D200S
mounting cords.
2.O2 Contact
strips are
not
extended
to
the
chaining
circuit.
This requires a
second
tip
and
ring
conductor
to
each module (except
the
last).
See
Fig. 4,
sheets
1 through
5.
2.Og
Lines on the telephone
set can
be transposed
from
one key position
or
key module
to
another by moving the 508-type plugs on the
back
of
the
keys. Mounting cord
conductors
are
of
sufficient length
to
allow
for
complete
flexibility
of the
508-type
Plugs.
Note:
On
initial
installation
the
508-type
and 509A plugs should follow
the
same color
sequence
for
each
key module: Pink (Hold
Button),
Light
Beige
(Chaining Switch),
Blue
(Line 1),
Orange
(Line 2),
Green
(Line
3)'
Poge I