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BELL SYSTEM PRACTICES
A7&TCo Standard
SECTION 502-612401
Issue 7, September 1980
SERVICE
2630- AND 2631 -TYPE
TELEPHONE
SETS
CONNECTIONS
AND MAINTENANCE
1.
GENERAL
1.01
This
section
contains
information
for the
2630DA (MD), 26630DAM (MD), or 2630DAMSI
(18-button)
and 2631DA (MD), 2631 DAM (MD), or
2631DAMS1 (30-button)
(Fig. 1, 2, and 3) telephone
sets.
These sets may be equipped
with different
modular
key arrangements.
The telephone
sets
will accommodate
635-type
or 658A keys,
76A
lamp
sockets,
and/or
a 679A
(MD)
internal
transmitter.
1.02
This section is reissued
to
Show the 2630DAM and 2631 DAM telephone
sets MD
Add the 2630DAMS1 and 2631DAMS1 telephone
sets
Add new Fig. 1
Revise Tables A, B, C, and E
Add new 841364376 polarity
guard.
1.03
$The new S coded telephone
sets are similar
to the previous
type sets except
they
are
equipped with a new line switch which breaks both
the tip and ring side of the line.
Previous
t,ype
sets only broke the ring side of the line.q
2.
CONNECTIONS
2.o1
The 2630- and 2631-type telephone
sets were
equipped
with a 635A5C (5-line pickup and
hold) or a 635AD5C (4-line pickup, cutoff, and hold)
key in the first module position.
$Current
2630-
and 2631-type sets are only equipped with a 635A5C
key in the first
module position.t
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
in the cut-off key position,
for
storing the slate mounting cord plug associated
with
the fifth line. 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
cord.
2.02
The 2630DAM
(MD) and
2631 DAM (MD)
modular
telephone
sets are similar
to the
2630DA (MD) or 2631DA (MD), respectively,
except
the modular G15A handset with its associated H4DU
cord and 616E jack assembly
are used in place of
the hard wired G3A-type
handset.
OThe S coded
sets also use the same modular
handset,
cord, and
jack.t
2.03
Because of the physical
arrangement
of the
635-type key, the contact strips do not extend
to the chaining
switch.
This requires
a second tip
and
ring
conductor
to each
module
(except
the
last).
See Fig. 4, Sheets
1
through
5.
2.04
The line conductors
of the mounting
cords
for these sets terminate
in individual
plugs
on a per line basis and are connected
to the rear
of the keys.
This permits
rearrangement
of line
appearances
either in the set or at the key equipment
distribution
point.
2.05
These sets can be used with 1A, lA1, 1A2,
6A, or 6B KTS.
Refer
to Table
A or B
for key modular
arrangements.
NOTICE
Not for use or disclosure outside the
Bell System except under written
agreement
Printed
in U.S.A.
Page 1
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