AT&T Bell System 2682 Series Service Manual

BEU SYSTEM PRACTICES
AT
&
TCo Standard
SECTION 502-612-42~
Issue 6, October 1980
SERVICE
2682- AND 2683-TYPE TELEPHONE SETS
CONNECTIONS AND MAINTENANCE
1.
GENERAL
1.01
This section contains information for 2682AA
(MD), 2682AAM (MD), or 2862AAMS1 (18-button)
and 2683AA (MD), 2683AAM (MD), or 2683AAMS1
(30-button) TOUCH-TONE® dial, CALL DIRECTOR®
type telephone sets.
1.02
This section is reissued to:
• Add information on the 2682AAMS1 and
2683AAMS1 telephone sets
• Update Fig. 3, 4, and 5
• Show the 2682 and 2683HAAM sets MD
• Add the new 840364376 polarity guard
(D-181006 Kit of Parts)
1.03
These sets (Fig. 1, 2, 3, and 4) provide
headset or handset operation.
1.04
.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) .•
1.05
They may be used for 2- or 4-wire service
on 1A1, 1A2, 6A, or 6B key telephone
systems. The 3-type (MD) speakerphone can provide
both 2- or 4-wire service per SD-69542-01. The
4A speakerphone may also be used; refer to
paragraph 2.07 .•
1.06
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
production sets are equipped with a satin-silver
( -87) mounting cord.
2.
CONNECTIONS
2.01
The 2682- 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)
or D200S (MD) mounting cord] 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
840151120 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.
2.02
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.
2.03
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),
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
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